What to Know About Cryptocurrency
Share this page
Facebook
Twitter
Linked-In
Cryptocurrency is digital money. That means there’s no physical coin or bill — it’s all online. You can transfer cryptocurrency to someone online without a go-between, like a bank. Bitcoin and Ether are well-known cryptocurrencies, but new cryptocurrencies continue to be created.
People might use cryptocurrencies for quick payments and to avoid transaction fees. Some might get cryptocurrencies as an investment, hoping the value goes up. You can buy cryptocurrency with a credit card or, in some cases, get it through a process called “mining.” Cryptocurrency is stored in a digital wallet, either online, on your computer, or on other hardware.
Before you buy cryptocurrency, know that it does not have the same protections as when you are using U.S. dollars. Also know that scammers are asking people to pay with cryptocurrency because they know that such payments are typically not reversible.
Cryptocurrencies vs. U.S. Dollars
Investing in Cryptocurrency
Paying with Cryptocurrency
Cryptocurrency Scams
Cryptojacking
Report Scams
Cryptocurrencies vs. U.S. Dollars
The fact that cryptocurrencies are digital is not the only important difference between cryptocurrencies and traditional currencies like U.S. dollars.
Cryptocurrencies aren’t backed by a government.
Cryptocurrencies are not insured by the government like U.S. bank deposits are. This means that cryptocurrency stored online does not have the same protections as money in a bank account. If you store your cryptocurrency in a digital wallet provided by a company, and the company goes out of business or is hacked, the government may not be able to step and help get your money back as it would with money stored in banks or credit unions.
A cryptocurrency’s value changes constantly.
A cryptocurrency’s value can change by the hour. An investment that may be worth thousands of U.S. dollars today might be worth only hundreds tomorrow. If the value goes down, there’s no guarantee that it will go up again.
Investing in Cryptocurrency
As with any investment, before you invest in cryptocurrency, know the risks and how to spot a scam. Here are some things to watch out for as you consider your options.
No one can guarantee you’ll make money.
Anyone who promises you a guaranteed return or profit is likely a scammer. Just because an investment is well known or has celebrity endorsements does not mean it is good or safe. That holds true for cryptocurrency, just as it does for more traditional investments. Don’t invest money you can’t afford to lose.
Not all cryptocurrencies — or companies promoting cryptocurrency — are the same.
Look into the claims that companies promoting cryptocurrency are making. Search online for the name of the company, the cryptocurrency name, plus words like “review,” “scam,” or “complaint.”
Read more about Investing Online.
Paying with Cryptocurrency
If you are thinking about using cryptocurrency to make a payment, know the important differences between paying with cryptocurrency and paying by traditional methods.
You don’t have the same legal protections when you pay with cryptocurrency.
Credit cards and debit cards have legal protections if something goes wrong. For example, if you need to dispute a purchase, your credit card company has a process to help you get your money back. Cryptocurrency payments typically are not reversible. Once you pay with cryptocurrency, you only can get your money back if the seller sends it back.
Before you buy something with cryptocurrency, know a seller’s reputation, where the seller is located, and how to contact someone if there is a problem.
Refunds might not be in cryptocurrency.
If refunds are offered, find out whether they will be in cryptocurrency, U.S. dollars, or something else. And how much will your refund be? The value of a cryptocurrency changes constantly. Before you buy something with cryptocurrency, learn how the seller calculates refunds.
Some information will likely be public.
Although cryptocurrency transactions are anonymous, the transactions may be posted to a public ledger, like Bitcoin’s blockchain. A blockchain is a public list of records that shows when someone transacts with cryptocurrency. Depending on the cryptocurrency, the information added to the blockchain can include information like the transaction amount. The information also can include the sender’s and recipient’s wallet addresses — a long string of numbers and letters linked to a digital wallet that stores cryptocurrency. Both the transaction amount and wallet addresses could be used to identify who the actual people using it are.
Cryptocurrency Scams
As more people get interested in cryptocurrency, scammers are finding more ways to use it. For example, scammers might offer investment and business “opportunities,” promising to double your investment or give you financial freedom.
Watch out for anyone who:
guarantees that you’ll make money
promises big payouts that will double your money in a short time
promises free money in dollars or cryptocurrency
makes claims about their company that are not clear
Cryptojacking
Cryptojacking is when scammers use your computer or smartphone’s processing power to “mine” cryptocurrency for their own benefit, and without your permission. Scammers can put malicious code onto your device simply by your visiting a website. Then they can help themselves to your device’s processor without you knowing.
If you notice that your device is slower than usual, burns through battery power quickly, or crashes, your device might have been cryptojacked. Here is what to do about it:
Close sites or apps that slow your device or drain your battery.
Use antivirus software, set software and apps to update automatically, and never install software or apps you do not trust.
Do not click links without knowing where they lead, and be careful about visiting unfamiliar websites.
Consider a browser extension or ad blockers that can help defend against cryptojacking. But do your research first. Read reviews and check trusted sources before installing any online tools. Some websites may keep you from using their site if you have blocking software installed.
abi ethereum
bitcoin services
ethereum supernova ethereum покупка One of the concerns that will occur on your way to learn how to mine Bitcoin is the noise. With the constant buzzing of hundreds of computer components, plus industrial-scale cooling facilities running 24 hours a day, a professional scale solo mining operation is going to be hellishly loud!bitcoin blog Other applications: DAOs and beyondвзлом bitcoin оплата bitcoin bitcoin knots
bitcoin мастернода обвал ethereum блок bitcoin monero dwarfpool ethereum org market bitcoin bus bitcoin взлом bitcoin community bitcoin 15 bitcoin график bitcoin bitcoin usb контракты ethereum bitcoin суть
понятие bitcoin bitcoin заработок арбитраж bitcoin cryptocurrency chart uk bitcoin bitcoin эмиссия doge bitcoin monero blockchain joker bitcoin bitcoin серфинг 'When we meditate, we count. We close our eyes and are aware only of where we are at in the moment, and nothing else. We count breathing in, 1; and we count breathing out, 2; and we go on this way. When we stop counting, that is the void, the number zero, the emptiness.'exchange bitcoin exchange cryptocurrency ann monero coingecko bitcoin контракты ethereum
ethereum проблемы habr bitcoin ethereum картинки капитализация ethereum stellar cryptocurrency txid ethereum ethereum io конец bitcoin bitcoin торрент bitcoin foto bitcoin сайт bitcoin vpn расчет bitcoin bitcoin торговать birds bitcoin bitcoin alien collector bitcoin bitcoin суть аналоги bitcoin bitcoin google ethereum block bitcoin конвертер ethereum dao apple bitcoin bitcoin location ethereum падение explorer ethereum ethereum упал cryptocurrency calculator bitcoin links tether 4pda free monero bitcoin 2017 cubits bitcoin
отслеживание bitcoin сложность ethereum Though Bitcoin was not designed as a normal equity investment (no shares have been issued), some speculative investors were drawn to the digital money after it appreciated rapidly in May 2011 and again in November 2013. Thus, many people purchase bitcoin for its investment value rather than as a medium of exchange.bitcoin department bitcoin nachrichten bitcoin цены bitcoin passphrase bitcoin marketplace tether limited bitcoin ротатор tether coin bitcoin motherboard перевод bitcoin bitcoin перевод монета ethereum adc bitcoin bitcoin account обменять monero bitcoin loto bitcoin node bitcoin казино 4pda tether The Silk Road story made it into newspapers across the world. This was both good and bad for Bitcoin. It was bad because Bitcoin became linked with online crime, but it was good because it showed that Bitcoin worked. The Silk Road story showed the world that Bitcoin was useful, and that it had a big group of people who wanted to use it (even though they were criminals).PB Mining Review: Claims to operate Bitcoin mining ASIC hardware. When customers buy a bitcoin mining contract then they will begin earning Bitcoins instantly. At Piggyback Mining, they cover the electricity costs and all Bitcoin mining pool fees. The Bitcoin mining contract is 100% insured because they want customers to succeed.convert bitcoin rate bitcoin Recent research on the lightning network shows signs of increased vulnerability due to the centralization of a number of nodes in the network that control a majority of funds. Developers are continuously exploring new possibilities to enhance the privacy and efficiency of the lightning, as well as ways to incorporate other technologies such as Schnorr into the network. There’s no doubt that it’ll be some time before such system-wide updates can successfully take place.One of the first questions that prospective cryptocurrency miners face is whether to mine solo or join a ‘pool’. There are a multitude of reasons both for and against mining pools. Here’s what you need to know.ethereum txid BITCOIN TRANSACTIONS ARE IRREVERSIBLEfoto bitcoin bitcoin phoenix Lack of Turing-completeness - that is to say, while there is a large subset of computation that the Bitcoin scripting language supports, it does not nearly support everything. The main category that is missing is loops. This is done to avoid infinite loops during transaction verification; theoretically it is a surmountable obstacle for script programmers, since any loop can be simulated by simply repeating the underlying code many times with an if statement, but it does lead to scripts that are very space-inefficient. For example, implementing an alternative elliptic curve signature algorithm would likely require 256 repeated multiplication rounds all individually included in the code.tether верификация coingecko ethereum ethereum pool компьютер bitcoin ethereum асик
icons bitcoin bitcoin hardfork doubler bitcoin ethereum биржа trezor bitcoin
monero стоимость курса ethereum bitcoin trade bitcoin agario tether перевод bitcoin софт escrow bitcoin cryptocurrency top
Unfortunately, like the average Bitcoin mining machine, the power supply is sold separately.linux bitcoin
monero cryptonote ethereum icon отзывы ethereum bitcoin com bitcoin india antminer ethereum poloniex monero bitcoin loan часы bitcoin bitcoin payeer bitcoin spinner pow bitcoin bitcoin форум генераторы bitcoin casper ethereum bitcoin alien
txid ethereum it bitcoin инвестирование bitcoin компания bitcoin bitcoin net теханализ bitcoin bitcoin обналичить
adbc bitcoin
polkadot cadaver lightning bitcoin nicehash bitcoin price bitcoin bitcoin биржи компания bitcoin bitcoin сделки generator bitcoin bitcoin blue bitcoin system bitcoin plus ethereum ubuntu
bitcoin store tether валюта динамика ethereum equihash bitcoin money bitcoin комиссия bitcoin ethereum аналитика ethereum клиент сложность ethereum bitcoin ann tether bitcointalk bitcoin greenaddress qr bitcoin laundering bitcoin
bitcoin betting
bitcoin status bitcoin monkey мастернода bitcoin майнер monero bitcoin sportsbook баланс bitcoin titan bitcoin plus500 bitcoin buying bitcoin tether верификация установка bitcoin bitcoin block converter bitcoin
bitcoin forex bitcoin обучение монета ethereum The block is verified by mining software and made visible to any 'miner' who wants to see it. Once a miner verifies it, the next block enters the chain, which is a record of every litecoin transaction ever made.As more miners join, the rate of block creation increases. As the rate of block generation increases, the difficulty rises to compensate, which has a balancing of effect due to reducing the rate of block-creation. Any blocks released by malicious miners that do not meet the required difficulty target will simply be rejected by the other participants in the network.bitcoin block bitcoin chain
maining bitcoin bitcoin create cryptonight monero bitcoin online ethereum биржа fenix bitcoin куплю ethereum bitcoin click статистика ethereum cryptocurrency price куплю bitcoin tcc bitcoin хабрахабр bitcoin javascript bitcoin bitcoin торрент ethereum habrahabr kurs bitcoin ethereum news bitcoin ann avto bitcoin ethereum доходность
bitcoin компания bitcoin кости darkcoin bitcoin ethereum usd c bitcoin bitcoin dark bitcoin ruble ethereum контракты партнерка bitcoin bitcoin earning
nxt cryptocurrency monero logo bitcoin матрица bitcoin видеокарты bitcoin king ethereum прогноз polkadot блог
king bitcoin difficulty bitcoin polkadot ico collector bitcoin bitcoin лого alpari bitcoin forbes bitcoin bitcoin safe монет bitcoin пример bitcoin bitcoin center
bitcoin formula ethereum mine siiz bitcoin blog bitcoin доходность ethereum bitcoin development 500000 bitcoin bitcoin хабрахабр micro bitcoin ico cryptocurrency mac bitcoin tp tether
wordpress bitcoin график bitcoin bitcoin s course bitcoin
moto bitcoin mining ethereum up bitcoin видеокарты bitcoin It’s decentralized, meaning its existence and value is not tied to any agency, government, corporation, or bank. No third party can prevent you from performing transactions with someone, although they can make it more difficult or illegal.usb bitcoin wallet tether блог bitcoin bitcoin dogecoin вклады bitcoin bittorrent bitcoin bitcoin fake minergate monero ethereum dag monero freebsd скачать tether bitcoin air monero форк ethereum обвал эфир ethereum monero проекта ethereum форк bitcoin bitcoin чат plus bitcoin fenix bitcoin 2x bitcoin bitcoin sweeper bitcoin icon bitcoin tm bitcoin xl bitcoin вложения ethereum miners bitcoin capital
майнить bitcoin korbit bitcoin bitcoin купить отзыв bitcoin ethereum пул bitcoin checker konvert bitcoin программа tether wechat bitcoin bitcoin status cryptonator ethereum analysis bitcoin bitcoin mine wiki ethereum bitcoin blue second bitcoin ninjatrader bitcoin ethereum code bitcoin xt bitcoin airbit 2016 bitcoin bitcoin dark пулы ethereum bitcoin lurk bitcoin loto bitcoin suisse autobot bitcoin bitcoin сокращение сбор bitcoin tether gps
теханализ bitcoin prune bitcoin dwarfpool monero bitcoin wordpress ethereum алгоритм bitcoin vk bitcoin анализ
monero benchmark word bitcoin bitcoin talk bitcoin server
get bitcoin
пожертвование bitcoin ethereum создатель bitcoin гарант bitcoin calculator баланс bitcoin 60 bitcoin daily bitcoin bitcoin fees bitcoin обзор bitcoin yen Pricesnxt cryptocurrency bitcoin hardfork location bitcoin paidbooks bitcoin close to 1 million, as shown belowmine ethereum bitcoin создать amd bitcoin bitcoin store bitcoin fpga monero dwarfpool bitcoin китай new bitcoin bitcoin drip wallpaper bitcoin бесплатные bitcoin asics bitcoin ethereum бесплатно курс bitcoin tether clockworkmod bitcoin js coffee bitcoin box bitcoin bitcoin currency bitcoin форум simple bitcoin
monero сложность cryptonator ethereum лохотрон bitcoin зарабатывать ethereum 6000 bitcoin bitcoin lurk node bitcoin
пулы monero capitalization bitcoin bitcoin keys connect bitcoin график monero ethereum хешрейт bitcoin trust click bitcoin bitcoin aliexpress bitcoin captcha monero вывод bitcoin freebie видео bitcoin
bitcoin weekly ethereum forks bitcoin форекс space bitcoin The protocol has a token emission rate that halves every 210,000 blocks, or approximately every 4 years.bitcoin обзор Bitcoin transactions are made using an anonymous alphanumeric address, that changes with every transaction, and a private key. Payments can also be made on mobile devices by using quick response (QR) codes.generator bitcoin tether usdt xbt bitcoin хешрейт ethereum
новости bitcoin конвертер ethereum start bitcoin bitcoin forum bitcoin freebitcoin bitcoin facebook bitcoin 2017 bitcoin casascius ninjatrader bitcoin
33 bitcoin bitcoin логотип ethereum монета bitcoin торрент bit bitcoin эмиссия ethereum bitcoin магазины bitcoin wordpress
обзор bitcoin monero benchmark
bitcoin parser ico monero
bitcoin транзакции amd bitcoin bitcoin торрент курс bitcoin monero обменять bitcoin best chaindata ethereum usb tether bitcoin machine bitcoin xbt команды bitcoin ethereum пул bitcoin биржи
ферма bitcoin bitcoin background code bitcoin кошель bitcoin fx bitcoin bitcointalk monero фото bitcoin bitcoin hyip bitcoin заработать dogecoin bitcoin верификация tether
monero difficulty ethereum калькулятор elysium bitcoin dance bitcoin korbit bitcoin bitcoin сигналы etherium bitcoin block bitcoin
bitcoin серфинг bitcoin принцип bitcoin etherium
Think of a block as a dataset that links the past to the present. Technically, individual blocks record changes to the overall state of bitcoin ownership within a given time interval. In aggregate, blocks record the entire history of bitcoin transactions as well as ownership of all bitcoin at any point in time. Only changes to the state are recorded in each passing block. How blocks are constructed, solved and validated is critical to the process of network consensus, and it also ensures that bitcoin maintains a fixed supply (21 million). Miners compete to construct and solve blocks that are then proposed to the rest of the network for acceptance. To simplify, think of the mining function as a continual process of validating history and clearing pending bitcoin transactions; with each block, miners add new transaction history to the blockchain and validate the entire history of the chain. It is through this process that miners secure the network; however, all network nodes then check the work performed by miners for validity, ensuring network consensus is enforced. More technically, miners construct blocks that represent data sets which include three critical elements (again simplifying):bitcoin сети mikrotik bitcoin The payment is a small amount of ETH that the person who wants to run the contract needs to send to the miner to make it work. This is similar to putting a coin in a jukebox.value bitcoin monero ico monero blockchain покер bitcoin миксер bitcoin bitcoin loan андроид bitcoin валюта bitcoin bitcoin blender bitcoin проверить bitcoin график maining bitcoin genesis bitcoin ethereum online
bitcoin mixer автомат bitcoin bitcoin bbc cryptocurrency blog bitcoin topfan bitcoin bitcoin обменять difficulty bitcoin
monero xeon bitcoin акции monero algorithm 16 bitcoin bitcoin euro ethereum конвертер
ebay bitcoin super bitcoin ethereum org клиент ethereum bitcoin gold bitcoin торги 500000 bitcoin electrum bitcoin bitcoin today bitcoin office conference bitcoin bitcoin алматы краны monero рулетка bitcoin s bitcoin tether комиссии lucky bitcoin ethereum форк bitcoin scripting HOW CRYPTOCURRENCY TRANSACTIONS WORKbitcoin symbol сложность ethereum
ethereum история bitcoin страна monero github
bitcoin grant bitcoin payment bitcoin webmoney bitcoin мавроди bitcoin машина bitcoin протокол bot bitcoin
bitcoin net ethereum покупка my bitcoin monero калькулятор bitcoin de bitcoin avto ethereum клиент rush bitcoin machine bitcoin токен bitcoin monero core bitcoin okpay
bitcoin оборудование кредит bitcoin win bitcoin blocks bitcoin ethereum blockchain ethereum forks калькулятор ethereum bitcoin мастернода buy tether in bitcoin captcha bitcoin
bitcoin virus миксер bitcoin registration bitcoin p2pool bitcoin миксер bitcoin home bitcoin зарегистрироваться bitcoin stellar cryptocurrency koshelek bitcoin clicker bitcoin bitcoin софт
bitcoin видеокарта bitcoin haqida doge bitcoin mercado bitcoin теханализ bitcoin bitcoin fan email bitcoin рубли bitcoin
bitcoin транзакция wikipedia ethereum bitcoin make bitcoin okpay теханализ bitcoin ethereum chart bitcoin лохотрон iota cryptocurrency fpga ethereum bitcoin center ethereum dark ledger bitcoin ethereum coin ethereum форки википедия ethereum bitcoin обозначение earn bitcoin bitcoin swiss cryptocurrency logo андроид bitcoin bitcoin адреса bitcoin fork
bitcoin продать nanopool ethereum ethereum nicehash 99 bitcoin бесплатно bitcoin
bitcoin hesaplama arbitrage cryptocurrency яндекс bitcoin bitcoin js токен bitcoin
vps bitcoin ethereum mist reindex bitcoin bitcoin рухнул testnet bitcoin Another alternative is CoinBox which is specifically designed for merchants wanting a straightforward option to receive payments. In these scenarios, the merchant enters the price of an item or service into the phone, which then presents a QR code containing the amount to be paid and the address the funds are sent to. The customer scans the QR code with their bitcoin wallet app and the payment is sent.bitcoin часы bitcoin card php bitcoin king bitcoin
nvidia bitcoin перспективы bitcoin cryptocurrency arbitrage bitcoin sha256 alpha bitcoin ethereum видеокарты security bitcoin bitcoin блокчейн cryptocurrency bitcoin прогноз bitcoin комбайн bitcoin journal bitcoin black trinity bitcoin bitcoin it forex bitcoin mmm bitcoin bitcoin info preev bitcoin ethereum node ethereum stratum calculator bitcoin bitcoin расшифровка ecopayz bitcoin flash bitcoin bitcoin pizza
bitcoin кошелек вложить bitcoin alpha bitcoin swarm ethereum ethereum алгоритм tokens ethereum
получить bitcoin webmoney bitcoin
moto bitcoin tether bootstrap ethereum blockchain bitcoin scam bitcoin poloniex tether usdt
обменять bitcoin котировки bitcoin bitcoin stock space bitcoin bitcoin arbitrage bitcoin кошелька simple bitcoin gui monero bitcoin bux
bitcoin banks bitcoin ne nicehash monero ethereum vk fire bitcoin ethereum addresses bitcoin kurs bitcoin матрица average bitcoin таблица bitcoin china bitcoin кости bitcoin bitcoin etherium de bitcoin транзакция bitcoin box bitcoin
ethereum видеокарты bitcoin видеокарты ethereum упал bitcoin окупаемость bitcoin депозит bitcoin аккаунт exchange ethereum bitcoin краны новости ethereum
2016 bitcoin bitcoin расшифровка cryptocurrency calendar ethereum 1070 шифрование bitcoin
bitcoin бонусы
сети ethereum bitcoin протокол ethereum api bitcoin wmz bitcoin direct bitcoin play lealana bitcoin card bitcoin bitcoin python ethereum pow
bitcoin mt4 bitcoin analysis bitcoin перевод bitcoin софт bitcoin global bitcoin шахта monero nicehash security bitcoin bitcoin торговля service bitcoin заработать monero bitcoin nodes japan bitcoin bitcoin electrum bitcoin nodes ethereum цена ethereum geth jpmorgan bitcoin bitcoin лайткоин криптовалюту monero
bitcoin q робот bitcoin tether верификация майнер bitcoin x2 bitcoin bitcoin x tether майнинг bitcoin switzerland
cryptocurrency charts bitcoin терминал monero dwarfpool Ring Confidential Transactions (RingCT) hide the amount of XMR being sent in a unique transaction. Specifically, only coinbase transactions display the amount of XMR in order to let everyone confirm that mining rewards are accurate.Ring Confidential Transactions follow a two-step process that works as follows:crococoin bitcoin ethereum проблемы биржа ethereum конвертер bitcoin bitcoin bitcointalk ethereum myetherwallet click bitcoin ethereum addresses котировка bitcoin bitcoin crash car bitcoin
полевые bitcoin future bitcoin bitcoin автокран bitcoin aliens ethereum прогнозы cryptocurrency bitcoin рулетка bitcoin trader bitcoin reindex bitcoin ethereum twitter bitcoin игры bitcoin nachrichten email bitcoin future bitcoin bitcoin ммвб bitcoin usa bitcoin аналитика simple bitcoin coinmarketcap bitcoin rigname ethereum tcc bitcoin bitcoin иконка boxbit bitcoin шифрование bitcoin ethereum 4pda bitcoin flapper korbit bitcoin bitcoin download bitcoin развод bitcoin putin bitcoin froggy
приложения bitcoin bitcoin account bitcoin fpga monero pro bitcoin aliens мониторинг bitcoin bitcoin payment bitcoin сколько bitcoin xl trader bitcoin bitcoin lucky фьючерсы bitcoin bitcoin лопнет Let’s break each one down.mine monero bitcoin переводчик bitcoin galaxy vpn bitcoin alpari bitcoin game bitcoin bitcoin reindex
сложность monero отзывы ethereum bitcoin автосерфинг king bitcoin
bitcoin buying bitcoin protocol андроид bitcoin difficulty bitcoin bitcoin опционы strategy bitcoin bitcoin tube бутерин ethereum flappy bitcoin bitcoin список dollar bitcoin autobot bitcoin
Jan. 3, 2009: The first Bitcoin block is mined, Block 0. This is also known as the 'genesis block' and contains the text: 'The Times 03/Jan/2009 Chancellor on brink of second bailout for banks,' perhaps as proof that the block was mined on or after that date, and perhaps also as relevant political commentary.7bitcoin purse monero вывод ethereum создатель bitcoin pizza tether usb bitcoin пул блокчейн bitcoin
bitcoin 2048 ethereum википедия
bitcoin skrill bitcoin таблица
платформы ethereum ethereum coin bitcoin сложность пополнить bitcoin динамика ethereum алгоритмы bitcoin доходность ethereum instant bitcoin
анимация bitcoin mining bitcoin cran bitcoin deep bitcoin lurkmore bitcoin neo bitcoin казахстан bitcoin ethereum динамика bye bitcoin monero simplewallet
tether usd asics bitcoin casinos bitcoin