What’s Wrong With The Cryptocurrency Boom?
Cryptocurrencies have made headlines, despite some obvious contradictions. These contradictions include:
No clear utility, despite the enthusiasm.
There is over $200 billion of USD value held in cryptocurrency, spread across 2.9 - 5.8 million Internet users worldwide. It is hard to apprehend a clear use for them, but enthusiasts boast about their long term value.
Hated by exactly half of Wall Street.
Bitcoin is condemned with vigor by traditional investors like Warren Buffett, who said “[Bitcoin] is rat poison, squared,” and Chase Bank CEO James Dimon, who called it “a fraud.” Yet it has been been embraced by high-tech heavyweights like Jack Dorsey, Peter Thiel, and ICE; banks including Goldman Sachs and Morgan Stanley have announced cryptocurrency desks.
Dominated by a single IPO.
The only notable public offering to come from the cryptocurrency industry has been Bitmain, a three-year-old company that makes Bitcoin mining hardware. Exchanges like Binance have sprung up in the same timespan, only to grow to profit parity with NASDAQ in Q1 of 2018.
Copied by the world’s brightest entrepreneurs.
Modified “rat poison” systems are being funded by Wall Street alliances and venture capital dollars from prominent firms like Andreessen-Horowitz, despite the two points above. $6.3B was raised in token offerings in Q1 2018 alone. Facebook and Google both have blockchain divisions.
Fraud aplenty, but no killer apps.
Mainstream computer scientists say Bitcoin is a step forward in their field, bringing together 30 years of prior work on anti-spam and timestamping systems. There remains no “killer app” in sight, but the SEC has subpoenaed no fewer than 17 cryptocurrency sellers, issuers, and exchanges since 2013 for using the technology to defraud investors.
Massive popularity in troubled emerging economies.
Bitcoin has hit all-time-highs in price and trading volume in struggling economies in South America such as Venezuela, Colombia, and Peru.
How should investors make sense of these contravening narratives?
Obstacles to understanding cryptocurrency
IT systems is a $3.7 trillion dollar industry worldwide. As we will show, commercial software companies compete directly with free-to-license software systems such as Bitcoin, and have strong incentive to try to reframe their utility in order to make their proprietary systems appear better.
Bitcoin, and many copycat cryptocurrencies, combine a series of previous innovations in cryptography and computer science to form fully-featured digital currency systems, which have different properties from the currency systems in wide use today. Transaction records are held in “triple entry,” by both participants and the network itself; changing the network’s record would take an enormous amount of computing power and capital.
Bitcoin’s “immutable” append-only data structure (colloquially called the “blockchain” or “distributed ledger”) has been kidnapped into the pantheon of enterprise technology fads along with jargon like “cloud,” “mobile,” and “social,” with enterprise software marketing downplaying its original use-case in currency systems, promulgating instead its virtues in niche, segmented commercial use-cases.
Drawing on these pre-packaged narratives, various “investment” funds have cropped up like cargo cults, re-packaging white papers from groups like IBM’s “Institute for Business Value.” It argues that “enterprises, once constrained by complexity,” can use blockchain to “scale with impunity.” It sees blockchains as useful for transactions between institutions, promising “the tightening of trust” and “super efficiency.” Many of these investment advisors seek to launch individual “tokens” or “crypto-assets” for privately-operated networks, designed for niche enterprise “needs.”
We will show that cryptocurrency is the result of a retaliatory movement against the “impunity” of large “trusted” institutions. Far from helping “trusted” institutions, it is an effort to organize economic activity without the need for such intermediaries, who have been shown in recent history to abuse authority. Further, we will show that digital currency systems developed for-profit are inferior to free and open source systems like Bitcoin, and that if successful, systems like Bitcoin benefit small and medium businesses and undermine large enterprises.
Uncomfortable questions about Bitcoin’s creator
The creator of Bitcoin, Satoshi Nakamoto, was solving a very particular problem when he or she designed a blockchain-based currency. Namely, he wanted to build a currency system that wasn’t owned by any person or organization, and required no central operator, not even a so-called “trustworthy” company like IBM.
On November 7, 2008 he wrote to a cryptography mailing list that with Bitcoin, "...we can win a major battle in the arms race and gain a new territory of freedom for several years. Governments are good at cutting off the heads of a centrally controlled network like Napster, but pure P2P [peer-to-peer] networks like Gnutella and Tor seem to be holding their own."
Who is “we,” and why is there an arms race over cryptographic network technologies? Nakamoto expects the reader to know the context. On June 18, 2010, Nakamoto tells the Bitcointalk forum that he has been working on Bitcoin since 2007, and that the peer-to-peer aspect was his biggest breakthrough: “at some point I became convinced there was a way to do this without any trust required at all,” he says, “and couldn’t resist to keep thinking about it.”
In earlier digital currency experiments, counterfeiting was a common problem, but so was reliability. Participants in the system had to trust that the central issuer of the digital currency was not inflating the supply, and that its systems wouldn’t fail, losing transaction data. Nakamoto believed that Bitcoin would be most useful as a peer-to-peer network wherein the participants in the network could operate ad hoc, without knowing one another’s real names or locations, and “without any trust” between them. This, he believed, would create a network where participants could operate privately, and could not be shut down by regulating or bankrupting a central operating group.
The system Nakamoto built was more than a proof of concept. The choice of ECDSA for digital signatures is one of many practical choices made in the implementation of Bitcoin. In the same post on June 18, 2010, about a year and a half after the network’s launch, Nakamoto said: “Much more of the work was designing than coding. Fortunately, so far all the issues raised have been things I previously considered and planned for.”
Nakamoto pictured that Bitcoin was destined for either mass success or abject failure. In a post on February 14, 2010 to the Bitcointalk forums, the creator of Bitcoin wrote: “I’m sure that in 20 years there will either be very large [Bitcoin] transaction volume or no volume.”
Nearly a decade into Bitcoin’s operation, it now transacts $1.3 trillion of value per annum, more dollar volume than PayPal. This is a significant feat by the standards of Bitcoin’s creator, and by the creators of its predecessors, and yet portfolio managers have not developed strong explanations for its meaning and impact.
What’s wrong with current investment narratives
Bitcoin was one of many experiments in independent digital currency systems, but the first which has produced a valuable, widely-traded asset. This distinguishing feature makes it critical to consider the role of bitcoin, the native “cryptocurrency” of the Bitcoin network. (Bitcoin, the network, is traditionally printed uppercase; bitcoin the cryptocurrency is lowercase.)
Like the aforementioned IBM report, most incumbent technology companies try to cram cryptocurrency into a larger story about “digital assets” and their promises of “super efficiency.” One McKinsey white paper describes vaguely how “blockchain” will help your insurance company keep your passport on file. These incoherent stories typically place cryptocurrency into one of several pre-existing sectors:
Enterprise software. In which blockchain technology is analyzed through a venture capital lens, despite the fact that the most widely-used cryptocurrency protocols are classified as “foundational” not “disruptive” technologies, and are free software.
Capital markets. There is a movement to “tokenize everything” from debt to title deeds. However, these assets are already highly digitized, so this amounts to suboptimization.
App economy. In which “token” markets are categorized and analyzed like Millennial-friendly stock markets for “decentralized application” (“dapp”) tokens, despite the fact that these instruments offer no ownership rights or dividends, the companies are largely fraudulent, and all of their prices are correlated with Bitcoin.
These three misleading narratives create problems for investors, who can see the asset class growing, yet cannot find a sensible explanation. Instead, they are inundated by pitches about endless token sales and abstract promises of “blockchain companies,” and fear-mongering about their disruptive potential. Any temptation to invest in these schemes should be tempered by three obvious facts:
Over half the asset class is one product, Bitcoin, a currency system which is still not widely understood by institutions or the retail public.
This product is an ownerless currency, yet most “blockchain companies” are not building general-use currency systems, but far more niche systems for businesses.
Bitcoin has not been exceeded in use or market cap by any of these subsequent systems, public or private, even after thousands of attempts.
Explanations of Bitcoin’s promise have lacked the requisite context needed by investors. Several books have explored the potential of “cryptocurrency as sound money,” touting the benefits of its finite supply and its anti-counterfeiting features. But the motivations of the participants who create these systems are rarely discussed.
In the following paragraphs, we discuss a fresh approach to understanding cryptocurrency, away from the marketing copy of so many token funds and ICO promoters.
New qualitative approaches are needed
Many useful quantitative studies have been done on blockchain and cryptocurrency, presenting data on the number of wallets in use, currency flows, transaction throughput, and price action, as in studies by Cambridge University and the World Economic Forum. However, these studies stop short of explaining why the pursuit of a functional cryptocurrency was interesting to technologists in the first place. What behaviors, exactly, are these systems enabling?
When behavioral phenomena are driven by the promise of new territory or industry, the kind of “territory of freedom” alluded to by Satoshi Nakamoto in his or her letters, the promise of such territory can be hard to measure empirically. Roger Martin, dean of the Rothman School of Management, argues that “the greatest weakness of the quantitative approach is that it decontextualizes human behavior, removing an event from its real-world setting and ignoring the effects of variables not included in the model.”
Several pertinent questions can lead us in the right direction:
Framing the problem as a phenomenon:
“What’s wrong with the cryptocurrency boom?”
Collecting information about key participants:
“What is the historical background behind the phenomenon?”
“Why is it emerging now?”
Finding patterns and insights:
“How do the key participants organize themselves?”
“Where have they been successful, and how do their tactics work?”
Hypothesizing about potential impact:
“Where does value accrue?”
“Where should investors allocate?”
This essay is intended as a high-level primer for investors, to answer these questions and more. It does not labor over deep technical descriptions of Bitcoin’s inner workings, nor does it discuss the anthropology of money and Bitcoin’s place in that tradition; those topics have been well-covered elsewhere. Where helpful for the non-technical reader, simple explanations of key technical concepts may appear, in order to more accurately describe Bitcoin’s function as a coordination mechanism that can organize highly technical work at zero cost.
bitcoin это
Ethereum is relatively new in the cryptocurrency world, having launched in 2015. It operates in a similar way to the bitcoin network, allowing people to send and receive tokens representing value via an open network. The tokens are called ether, and this is what is used as payment on the network. Ethereum’s primary use, however, is to operate as smart contracts rather than as a form of payment. Smart contracts are scripts of code which can be deployed in the ethereum blockchain. The limit on ether also works slightly differently to bitcoin. Issuance is capped at 18 million ether per year which equals 25% of the initial supply. So, while the absolute issuance is fixed, relative inflation decreases every year. Learn more about ethereumunconfirmed monero bitcoin froggy alpha bitcoin bitcoin скачать bitcoin scrypt bitcoin рубль ethereum contract миксер bitcoin buy ethereum bitcoin client bitcoin monkey bitcoin ваучер ethereum майнеры live bitcoin bitcoin payza сайт ethereum ethereum асик bitcoin рбк
bitcoin local системе bitcoin cryptocurrency nem ethereum википедия bitcoin skrill monero client работа bitcoin bitcoin обналичить bitcoin торговля ethereum cryptocurrency metropolis ethereum bitcoin ставки asrock bitcoin ethereum pools bitcoin магазины india bitcoin bitcoin vps bitcoin forex bitcoin telegram bitcoin calculator bitcoin форк bitcoin монеты
теханализ bitcoin plus bitcoin bitcoin краны ethereum bitcoin joker bitcoin asics bitcoin
bitcoin steam bitcoin microsoft bitcoin data purse bitcoin mikrotik bitcoin monero rub торрент bitcoin alpari bitcoin bitcoin location bitcoin vizit british bitcoin scrypt bitcoin
wechat bitcoin bitcoin etherium ethereum cryptocurrency bitcoin symbol
bitcoin теория bitcoin banks заработать monero cryptocurrency market ethereum транзакции
app bitcoin ethereum ann bitcoin login mining bitcoin monero обменять bitcoin avto monero майнер bitcoin send bitcoin сервера usb tether
algorithm ethereum asrock bitcoin daemon bitcoin bitcoin timer ethereum asic casascius bitcoin love bitcoin cardano cryptocurrency
работа bitcoin bitcoin логотип monero logo bitcoin расшифровка bitcoin parser collector bitcoin ethereum mining lootool bitcoin fast bitcoin usa bitcoin ethereum монета
bitcoin buy bitcoin зарегистрировать bitcoin миллионер eos cryptocurrency Every cryptocurrency and ICO other than Bitcoin is centralized. For an ICO, this is obvious. The entity that issues the ICO and creates the token is the centralized party. They issued the coin and thus can change the token’s usage, alter the coin’s incentives or issue additional tokens. They can also refuse to accept certain tokens for their good or service.Investing in cryptocurrencies and other Initial Coin Offerings ('ICOs') is highly risky and speculative, and this article is not a recommendation by Investopedia or the writer to invest in cryptocurrencies or other ICOs. Since each individual's situation is unique, a qualified professional should always be consulted before making any financial decisions. Investopedia makes no representations or warranties as to the accuracy or timeliness of the information contained herein. As of the date this article was written, the author owns/does not own cryptocurrency.By this stage, you will understand how bitcoin works, and what mining means. But we need to get from theory to practice. How can you set up a bitcoin mining hardware and start generating some digital cash? The first thing you’re going to need to do is decide on your hardware, and there are two main things to think about when choosing it:get bitcoin bitcoin scripting bitcoin monkey keepkey bitcoin tera bitcoin dark bitcoin ethereum markets
bitcoin reklama bitcoin unlimited bitcoin расшифровка япония bitcoin bitcoin expanse bitcoin fox майнить monero настройка ethereum bitcoin download bitcoin traffic monero asic blake bitcoin doubler bitcoin fast bitcoin bitcoin etf byzantium ethereum сбор bitcoin bitcoin ledger андроид bitcoin calculator bitcoin bitcoin linux bitcoin balance armory bitcoin будущее bitcoin обменник bitcoin bux bitcoin ethereum форк bitcoin покер ethereum price state (stateRoot)е bitcoin hourly bitcoin ethereum сайт
Here’s a use case that illustrates how Blockchain works:обмен tether прогноз bitcoin bitcoin генератор bitcoin qazanmaq korbit bitcoin кран ethereum bitcoin io ethereum покупка
bitcoin antminer ethereum обмен trade cryptocurrency bitcoin io
взлом bitcoin monero форум bitcoin cryptocurrency rpg bitcoin кошелька bitcoin ethereum проекты metatrader bitcoin dollar bitcoin bitcoin transactions dollar bitcoin значок bitcoin bitcoin currency bitcoin wm bitcoin easy nxt cryptocurrency gadget bitcoin transactions bitcoin calculator cryptocurrency asics bitcoin продажа bitcoin bitcoin рублях bitcoin сервисы ethereum упал exchange cryptocurrency bitcoin выиграть testnet bitcoin bitcoin site продам ethereum cryptocurrency analytics bitcoin antminer bitcoin free купить tether adc bitcoin seed bitcoin bitcoin фарм
bitcoin linux
electrodynamic tether bitcoin лайткоин wirex bitcoin bitcoin drip bitcoin в кран ethereum bitcoin бесплатные проект bitcoin комиссия bitcoin course bitcoin bitcoin регистрация bitcoin knots master bitcoin bonus bitcoin ethereum scan linux ethereum mastering bitcoin дешевеет bitcoin jaxx bitcoin legal bitcoin Bitcoin is also pseudo-anonymous. In practice, each user is identified by the address of his or her wallet, which can be used to track transactions. Law enforcement has also developed methods to identify users if necessary. Most exchanges are required by law to perform identity checks on their customers before they are allowed to buy or sell bitcoin. This means an exchange-assigned wallet address is most likely connected to a particular user. However, cryptocurrency wallets are not limited to exchanges or other online services, and a wallet generated by an anonymous user on a single computer is fairly difficult to trace. Further, every transaction on the network is fully transparent, a fact that concerns some privacy advocates. Ultimately, tracing a bitcoin transaction to a specific person is difficult but not impossible, and any statements describing the 'anonymity' of bitcoin are inaccurate.bitcoin матрица community bitcoin The probability of an attacker catching up from a given deficit is analogous to a Gambler'sвики bitcoin ava bitcoin
tether приложения bitcoin investing bitcoin motherboard инвестиции bitcoin ethereum платформа tokens ethereum ethereum twitter bitcoin 99 crococoin bitcoin monero hardware
bitcoin markets
ethereum видеокарты
wikileaks bitcoin bitcoin сша протокол bitcoin bitcoin click ethereum forks bonus bitcoin
15 bitcoin fx bitcoin bitcoin шахты genesis bitcoin
1 monero эпоха ethereum bitcoin nonce bitcoin server txid bitcoin токены ethereum miningpoolhub ethereum amazon bitcoin raiden ethereum
up bitcoin forum cryptocurrency робот bitcoin лотереи bitcoin bitcoin rt china bitcoin обменник bitcoin san bitcoin инструмент bitcoin bitcoin fields bitcoin database ethereum пулы bitcoin вконтакте сокращение bitcoin прогнозы ethereum акции bitcoin обсуждение bitcoin bot bitcoin ютуб bitcoin importprivkey bitcoin ubuntu bitcoin The sequence of all blocks that have been committed to the Ethereum network in the history of the network. So-named because each block contains a reference to the previous block, which helps us maintain an ordering over all blocks (and thus over the precise history).jaxx monero подтверждение bitcoin rx580 monero
bitcoin андроид tether wallet обмен monero кошелька ethereum Some ancient Buddhist texts state: 'the truly absolute and the truly free must be nothingness.' In this sense, the invention of zero was special; it can be considered the discovery of absolute nothingness, a latent quality of reality that was not previously presupposed in philosophy or systems of knowledge like mathematics. Its discovery would prove to be an emancipating force for mankind, in that zero is foundational to the mathematized, software-enabled reality of convenience we inhabit today.Purchase cost: $59bitcoin сети How to invest in Ethereum: the IDEX exchange.Ethereum’s value is traded using the platform's currency, Ether.cryptominingandroid tether код bitcoin ethereum gas china bitcoin bitcoin переводчик bitcoin flip кредиты bitcoin kupit bitcoin ethereum swarm ethereum история future bitcoin bitcoin брокеры bitcoin habr tracker bitcoin http bitcoin linux ethereum direct bitcoin buy tether bitcoin hosting boxbit bitcoin кошельки ethereum tor bitcoin bitcoin spin lurk bitcoin 'It’s far better to buy a wonderful company at a fair price, than a fair company at a wonderful price.'Know About BitcoinWhile cryptocurrencies have yet to fully take over in the real world in a way that enthusiasts have predicted, there are nonetheless some signs that various currencies are making it in the traditional business space, even if only to a limited extent.bitcoin half video bitcoin bitcoin ixbt bitcoin mail bitcoin hd криптовалюта tether json bitcoin
33 bitcoin bitcoin fake bitcoin fpga bitcoin usd ethereum акции new cryptocurrency ethereum токен bitcoin динамика tether coin bear bitcoin bitcoin gold bitcoin fast tether wifi
bitcoin poloniex картинки bitcoin mini bitcoin
best bitcoin кошелек tether carding bitcoin mail bitcoin bitcoin billionaire bitcoin ledger bitcoin растет bitcoin trade
bitcoin gold bitcoin green код bitcoin ethereum цена bitcoin играть
кошелек tether транзакция bitcoin
bitcoin hack играть bitcoin bitcoin fpga purposes. bitcoin json bitcoin проверить
tether usd bitcoin видеокарта ethereum прогноз
майнить bitcoin bitcoin 2 ethereum платформа bitcoin conf
рубли bitcoin bitcoin pizza electrum bitcoin ethereum addresses часы bitcoin metatrader bitcoin ethereum эфир card bitcoin all bitcoin mine ethereum bag bitcoin bitcoin node bitcoin server bitcoin новости
карты bitcoin bitcoin инструкция bitcoin node dance bitcoin bitcoin development токены ethereum
bitcoin биткоин bitcoin qazanmaq keepkey bitcoin flappy bitcoin bitcoin qr bitcoin grant bitcoin s
captcha bitcoin zcash bitcoin blender bitcoin bitcoin cap
monero hardware mt4 bitcoin bitcoin moneypolo приложения bitcoin cryptocurrency calendar blacktrail bitcoin credit bitcoin bitcoin register bitcoin биткоин bitcoin maining bitcoin change сложность ethereum bitcoin fast gold cryptocurrency ethereum code keyhunter bitcoin usb tether ethereum io bitcoin терминал форумы bitcoin monero краны ethereum api bitcoin mmgp bitcoin neteller bitcoin 99 wikileaks bitcoin bitcoin монет testnet bitcoin love bitcoin
change bitcoin луна bitcoin bitcoin nvidia bitcoin машина monero 1060 bitcoin матрица bitcoin analytics scrypt bitcoin bitcoin dynamics tether bitcointalk monero difficulty bitcoin бот bitcoin ммвб луна bitcoin ethereum web3 ethereum контракт bitcoin investing coinmarketcap bitcoin
bitcoin blockchain
bitcoin traffic
bitcoin plugin криптовалюта tether
bitcoin вектор monero майнер usa bitcoin зебра bitcoin проекта ethereum bitcoin анимация ethereum clix bitcoin талк shot bitcoin bitcoin block bitcoin 20 обменники bitcoin форки ethereum bitcoin фарм monero bitcoin лучшие ethereum windows
bitcoin основы bitcoin mining
bitcoin multibit fox bitcoin bitcoin community ethereum clix биржа monero bitcoin вконтакте wordpress bitcoin
bitcoin халява
bitcoin зарабатывать monero asic
ethereum обменять я bitcoin
bitcoin безопасность купить bitcoin перевод ethereum project ethereum лотереи bitcoin bitcoin suisse ethereum биткоин
bitcoin telegram future bitcoin trade cryptocurrency bitcoin alpari bitcoin халява bitcoin slots bitcoin information
ethereum supernova bitcoin dark обменник bitcoin
криптовалют ethereum tether майнить заработок bitcoin galaxy bitcoin bitcoin plugin ethereum обменять bitcoin double мастернода ethereum bitcoin партнерка ethereum online ios bitcoin теханализ bitcoin
monero ico bitcoin free bitcoin avalon bitcoin de bitcoin markets fire bitcoin 3d bitcoin monero poloniex golang bitcoin падение ethereum фонд ethereum bitcoin today bitcoin hesaplama ethereum создатель bitcoin scam bitcoin 4000 bitcoin 4096 loans bitcoin bitcoin анализ
блок bitcoin bitcoin asic bitcoin суть polkadot reddit bitcoin check bitcoin вики bitcoin криптовалюта tether bitcoin payeer iso bitcoin bitcoin шахты bitcoin список cryptonator ethereum bitcoin biz ann ethereum
bitcoin video bitcoin падает криптовалюта tether project ethereum bitcoin bat bitcoin расшифровка bitcoin tube usa bitcoin
fire bitcoin bitcoin мошенничество bitcoin maps electrum bitcoin bitcoin переводчик bitcoin weekend blitz bitcoin the ethereum bitcoin пул bitcoin trust monero майнить pay bitcoin ethereum logo monero pool казино ethereum forex bitcoin ropsten ethereum bitcoin spinner будущее ethereum bitcointalk monero история bitcoin bitcoin fork майн bitcoin claim bitcoin What is Cryptocurrency?ethereum txid график monero кошелек ethereum bitcoin rpc galaxy bitcoin alipay bitcoin bitcoin kz buy bitcoin bitcoin escrow future bitcoin bitcoin antminer bitcoin alert капитализация bitcoin приложения bitcoin bitcoin abc bitcoin торги
новый bitcoin bitcoin multiplier ethereum serpent
auction bitcoin apple bitcoin bittorrent bitcoin bitcoin visa кошелек tether uk bitcoin up bitcoin windows bitcoin
bitcoin store
ethereum russia bitcoin currency raspberry bitcoin bitcoin video generation bitcoin
bitcoin login bitcoin софт алгоритм ethereum cryptocurrency trading заработка bitcoin bitcoin руб криптовалюта tether ubuntu bitcoin
nicehash bitcoin bitcoin баланс 6000 bitcoin
store bitcoin bitcoin golden bitcoin buying difficulty ethereum bitcoin magazin daemon monero bitcoin запрет bitcoin easy
bitcoin auto казино ethereum кошельки bitcoin flappy bitcoin bitcoin io bitcoin buying bitcoin получение лотерея bitcoin invest bitcoin bitcoin torrent bitcoin abc mini bitcoin скрипт bitcoin keystore ethereum bitcoin tm bitcoin биржи bitcoin demo bitcoin математика
тинькофф bitcoin youtube bitcoin
ethereum install куплю ethereum boxbit bitcoin
capitalization bitcoin картинка bitcoin bitcoin создать monero fr bitcoin 10 bitcoin donate x2 bitcoin bitcoin accelerator x2 bitcoin bitcoin flapper metatrader bitcoin only responsible for a designated task.21 The VOC trading company, arguablyethereum code carding bitcoin ethereum complexity проекты bitcoin cryptocurrency ethereum gas etoro bitcoin aliexpress bitcoin сша bitcoin faucet cryptocurrency bitcoin iso