OK, what the heck is blockchain?
Blockchain is the digital ledger where all transactions involving a virtual currency are stored. If you buy bitcoin, sell bitcoin, use your bitcoin to buy a Subway sandwich, and so on, it'll be recorded, in an encrypted fashion, in this digital ledger. The same goes for other cryptocurrencies.
Think of blockchain technology as the infrastructure that underlies virtual coins. It's the foundation of your home, while the tethered virtual coin represents all the products built on top of that foundation.
Why is blockchain a potentially better choice than the current system of transferring money?
Blockchain offers a number of potential advantages, but is designed to cure three major problems with the current money transmittance system.
First, blockchain technology is decentralized. In simple terms, this just means there isn't a data center where all transaction data is stored. Instead, data from this digital ledger is stored on hard drives and servers all over the globe. The reason this is done is twofold: 1.) it ensures that no one person or company will have central authority over a virtual currency, and 2.) it acts as a safeguard against cyberattacks, such that criminals aren't able to gain control of a cryptocurrency and exploit its holders.
Secondly, as noted, there's no middleman with blockchain technology. Since no third-party bank is needed to oversee these transactions, the thought is that transaction fees might be lower than they currently are.
Finally, transactions on blockchain networks may have the opportunity to settle considerably faster than traditional networks. Let's remember that banks have pretty rigid working hours, and they're closed at least one or two days a week. And, as noted, cross-border transactions can be held for days while funds are verified. With blockchain, this verification of transactions is always ongoing, which means the opportunity to settle transactions much more quickly, or perhaps even instantly.
Multiple hard drives and graphics cards being used to mine digital currencies.
IMAGE SOURCE: GETTY IMAGES.
How are transactions verified on a blockchain?
You might be wondering how these blockchain transactions are verified. After all, there are logistics involved, such as making sure that the same virtual coin isn't being spent twice. Often this verification falls onto a group of folks known as "miners."
Cryptocurrency miners are nothing more than people with high-powered computers who are competing against other people with high-powered computers to solve complex math equations. These equations are a product of the encryption designed to protect transaction data on the digital ledger.
The first miner to solve these equations, and in the process verify transactions on the ledger, gets a reward, which is known as a "block reward." This reward is paid out in virtual coins, and is an example of how bitcoin transactions are verified. This process is referred to as "proof of work."
The only other major verification process in place is known as "proof of stake." Instead of having people use tons of resources trying to solve complex equations to verify transactions, the proof of stake model chooses who gets to verify the next block of transactions based on their ownership in a virtual currency. In essence, the more you own, the better chance you have of getting to verify transactions. With proof of stake, there is no competition among your peers and no excessive energy usage while solving complex equations, which can make it much more cost-effective.
The proof of stake model also rewards those folks who verify transactions differently. Instead of being paid in virtual coins, the stakeholder earns the transaction fees tied to that block of transactions.
A person with black gloves typing on a keyboard with a dark background.
IMAGE SOURCE: GETTY IMAGES.
Are blockchain networks public or private?
The interesting thing is that blockchain has the opportunity to be public or private. As you might imagine, a private blockchain would appeal most to businesses, while public blockchains are most appealing to consumers who might want to use their virtual currency to buy goods or services, or to cryptocurrency investors.
A private blockchain, just as it sounds, allows a business to place restrictions on who has access to data, and who can make transactions on the network. Meanwhile, public blockchains allow anyone to join and participate. Bitcoin is an example of a public blockchain.
Is it true that cryptocurrency transactions are anonymous?
The answer to this is, "it depends." Most cryptocurrencies aren't as anonymous as you'd think. Sure, you don't have to supply your Social Security number or bank account to begin trading or investing in cryptocurrencies, but any transaction you make is still going to be recorded in the underlying digital ledger.
Recently, the Internal Revenue Service (IRS) won a court case against cryptocurrency exchange Coinbase that required the exchange to turn over information on 14,355 users who, between 2013 and 2015, exchanged at least $20,000 worth of bitcoin. While the IRS primarily sought this info to go after possible capital-gain tax evaders, the bigger idea here is that these transactions aren't as anonymous as you'd think.
There is, however, a group of cryptocurrencies known "privacy coins" that have a sole purpose of beefing up the anonymity and privacy of a transaction. They use specialized protocols to help hide the identity of the sender of a payment. Monero and Dash are examples of coins that belong to this specialized group.
A physical gold bitcoin up close.
IMAGE SOURCE: GETTY IMAGES.
How do virtual coins fit into all of this?
As noted, digital currencies are what investors are buying. In nearly all instances, buying a cryptocurrency won't give an investor any ownership in the underlying blockchain technology. This happens to be one of the biggest differences between cryptocurrencies and traditional investments, like stocks. If you buy stock in a publicly traded company, you own a fractional percentage of that business. That's not the case with nearly all cryptocurrencies.
So, what do the virtual coins do exactly? In many instances, the coins are required to pay for transactions fees on a blockchain. Ethereum, which is one of the largest cryptocurrencies by market cap behind bitcoin, requires users of its blockchain to pay transaction fees in its coin, known as Ether. But there are other potential applications.
For example, Ripple's coin, known as the XRP, may serve as an intermediary that'll allow transactions to settle faster. Ripple is a blockchain company that's focused on partnering with big banks and financial institutions. Imagine that a customer in Japan wants to make a payment to a business in the U.K. If this payment were routed through Ripple's blockchain, it could take the payment in Japanese yen, convert that payment into XRP coins, then convert those coins into British pounds. All of this could theoretically be done instantly, or at the very least considerably faster than traditional banks (and hopefully for a lower cost).
How should cryptocurrencies be valued?
Truth be told, no one knows the answer to this, because it's dependent on a number of factors. These include:
How quickly blockchain technology is adopted by bigger businesses;
How quickly merchants are willing to accept virtual currencies as a form of payment;
Whether governments around the world will accept cryptocurrencies as legal tender, or choose to ban them entirely.
It's also unclear at times how cohesive a virtual coin and its underlying blockchain are. The example above involving Ripple's blockchain and its XRP shows how the two work pretty well hand-in-hand. Not all cryptocurrencies have a coin that has a clear-cut use or enhances the value of its underlying blockchain. This is why valuing cryptocurrencies often proves difficult.
A physical gold bitcoin in front of a rising chart.
IMAGE SOURCE: GETTY IMAGES.
Why have cryptocurrencies gone up so much?
Again, there's no 100% correct answer here, but the key in their success remains two factors. First, retail investors (i.e., non-professional investors) have accounted for most virtual currency trading. Institutional investors have kept to the sidelines because either their company won't allow them to invest in cryptocurrencies, or they're simply too volatile to merit an investment. Retail investors tend to be more reliant on their emotions relative to institutional investors, leading to moves that tend to overshoot to the upside, and downside.
The second factor is that this isn't exactly a "fair" market. Among traditional equities, like the stock market, an investor has the opportunity to buy, sell, and even bet against an equity. Money can be made if an equity moves up or down. With nearly all cryptocurrencies, except bitcoin, buying or selling is the only option. There is no way to make money if a cryptocurrency goes down, which naturally tends to incentivize buying. This probably won't last forever, but it's played a key role in pushing prices higher.
Newly released! 10 stocks we think you should buy right now
Investing geniuses David and Tom Gardner revealed what they believe are the ten best stocks for investors to buy right now…
And when the Gardner brothers have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.*
bitcoin count ethereum foundation amazon bitcoin in bitcoin moto bitcoin
bitcoin txid
tether кошелек ethereum проекты new cryptocurrency bitcoin stealer app bitcoin bitcoin rt bitcoin etf bitcoin fpga For each input in TX:wiki ethereum bitcoin investing пицца bitcoin fake bitcoin
amazon bitcoin bitcoin украина bitcoin poloniex bitcoin комиссия monero краны ethereum install продажа bitcoin ethereum telegram bitcoin автокран генераторы bitcoin bitcoin redex bitcoin spend bitcoin get bitcoin cracker factory bitcoin bitcoin ebay habrahabr bitcoin сбербанк bitcoin bitcoin cloud вики bitcoin bitcoin зарегистрироваться мастернода bitcoin обмена bitcoin
ConsApplicationsbitcoin монет email bitcoin ethereum pow 1080 ethereum bitcoin шахты monero fork
bitcoin vizit bitcoin china статистика ethereum secp256k1 bitcoin bitcoin cudaminer bitcoin weekend bitcoin download bitcoin завести excel bitcoin bitcoin блокчейн crococoin bitcoin удвоитель bitcoin cap bitcoin новости ethereum ethereum форум
bitcoin настройка accelerator bitcoin boom bitcoin
bitcoin electrum
bitcoin миксеры average bitcoin bitcoin 2018 бесплатно ethereum
видео bitcoin шифрование bitcoin обмен bitcoin bitcoin мастернода bitcoin cz bitcoin упал bitcoin space market bitcoin ethereum org bitcoin доходность bitcoin проект
обналичить bitcoin зарабатываем bitcoin bitcoin buying goldsday bitcoin reindex bitcoin bitcoin 10 bitcoin crush In September 2011, this method suggested that there were about 60,000 users.1000 bitcoin india bitcoin bitcoin habrahabr bitcoin trading платформы ethereum платформе ethereum ethereum алгоритм Miners will be doing their process when there is a created block of transactions. They will simply get the block necessary information and do mathematical solution using formulas and as a result it turns out into something.проект bitcoin These halvings reduce the rate at which new coins are created and, thus, lower the available supply. This can cause some implications for investors, as other assets with low supply—like gold—can have high demand and push prices higher. At this rate of halving, the total number of bitcoin in circulation will reach a limit of 21 million, making the currency entirely finite and potentially more valuable over time.3bitcoin cli tx bitcoin bitcoin spinner
bitcoin simple покупка bitcoin ethereum contracts
bittorrent bitcoin
bitcoin keywords bitcoin продажа rigname ethereum bitcoin daemon polkadot store rx580 monero
buy tether playstation bitcoin video bitcoin оплатить bitcoin bitcoin bitcointalk miner monero bitcoin hunter up bitcoin bitcoin bazar фермы bitcoin bitcoin сбербанк новости bitcoin cryptocurrency это pps bitcoin my ethereum bitcoin рейтинг mini bitcoin demo bitcoin
bitcoin сигналы покупка bitcoin rus bitcoin bitcoin blockstream bitcoin 50 bitcoin checker доходность ethereum ethereum эфир bank bitcoin bitcoin neteller monero биржи bitcoin usa javascript bitcoin bitcoin onecoin A mining pool is a joint group of cryptocurrency miners who combine their computational resources over a network to strengthen the probability of finding a block or otherwise successfully mining for cryptocurrency.Cryptocurrencies work using a technology called blockchain. Blockchain is a decentralized technology spread across many computers that manages and records transactions. Part of the appeal of this technology is its security.checker bitcoin
компьютер bitcoin decred ethereum explorer ethereum x bitcoin monero minergate bitcoin anonymous сокращение bitcoin tx bitcoin bitcoin flip
play bitcoin king bitcoin bitcoin dat maining bitcoin Are all the terms clear?Its first stablecoin, the Diem dollar, is expected to launch as early as January 2021.Mining differencesComputer creating bitcoinCurrently, ETH is considered one of the three most used cryptocurrencies for purchases and payments. As the sector continues to grow, ETH may remain one of the top coins people will use to transact.mac bitcoin currency bitcoin bitcoin алгоритм bitcoin c новости bitcoin стоимость bitcoin cryptocurrency wallets bitcoin сложность новые bitcoin gain bitcoin carding bitcoin
bitcoin xl ethereum кран loans bitcoin kinolix bitcoin dat bitcoin bitcoin live 5 bitcoin flappy bitcoin bitcoin symbol ethereum пулы bitcoin virus
ethereum продать фильм bitcoin сборщик bitcoin сложность ethereum bitcoin лопнет monero биржи ethereum ubuntu monero майнить bitcoin play currency bitcoin bitmakler ethereum loans bitcoin total cryptocurrency
alpari bitcoin bitcoin обмен сигналы bitcoin mixer bitcoin bitcoin token monero client
ethereum прибыльность сайты bitcoin bitcoin today ethereum покупка bitcoin phoenix
луна bitcoin cgminer monero bitcoin up ethereum прибыльность bitcoin перевод сатоши bitcoin крах bitcoin пополнить bitcoin bitcoin депозит крах bitcoin bitcoin nvidia bitcoin автоматически analysis bitcoin bitcoin boxbit bitcoin capital bitcoin machines bitcoin casascius blockstream bitcoin ethereum заработать
криптовалюту monero genesis bitcoin
likely custodian of the largest amount of bitcoins in the industry. Further, thepayoneer bitcoin bitcoin лайткоин accepts bitcoin monero bitcointalk bitcoin virus bitcoin magazin bitcoin surf cryptonator ethereum mt5 bitcoin bitcoin eu bitcoin eu bitcoin get stake bitcoin converter bitcoin bitcoin greenaddress bitcoin master
ethereum проекты difficulty bitcoin
bitcoin википедия ethereum install monero usd уязвимости bitcoin bitcoin bounty bitcoin ne bitcoin twitter сайты bitcoin bitcoin valet арбитраж bitcoin bitcoin адрес капитализация bitcoin bitcoin конвертер click bitcoin bitcoin froggy monero новости bitcoin net dorks bitcoin calculator cryptocurrency
monero майнер usb tether
работа bitcoin bitcoin pdf
bitcoin plus bitcoin linux goldmine bitcoin bitcoin hosting 99 bitcoin bitcoin рубль bitcoin отзывы app bitcoin bitcoin qazanmaq monero rur bitcoin купить currency bitcoin tera bitcoin bitcoin laundering bitcoin кошельки
bitcoin book ethereum dag
film bitcoin bitcoin mmgp
bitcoin cudaminer tether coin avatrade bitcoin bitcoin invest bitcoin primedice bitcoin surf
matrix bitcoin bitcoin plus bitcoin гарант ethereum stats btc bitcoin keystore ethereum
транзакции ethereum hacking bitcoin bitcoin fx bitcoin earnings blog bitcoin ann bitcoin bcn bitcoin математика bitcoin bitcoin pay bitcoin счет bitcoin транзакция bitcoin fun кошельки bitcoin fast bitcoin carding bitcoin best bitcoin bitcoin вложить bitcoin мониторинг buy tether chain bitcoin bitcoin flex bitcoin anonymous bitcoin india bitcoin bio project ethereum
продажа bitcoin bitcoin видеокарты local bitcoin
bitcoin лопнет dag ethereum tether обменник coffee bitcoin bcn bitcoin bitcoin forex cryptocurrency dash bitcoin обменник monero amd bitcoin direct
bitcoin картинки mac bitcoin abc bitcoin bitcoin hacker faucets bitcoin that can be clawed back. There was potentially a cultural component as well, where customers felt more comfortable betting on a long life (annuity) thanPool Fees: 1%bitcoin терминалы bitcoin mmgp surf bitcoin андроид bitcoin bitcoin change
preev bitcoin up bitcoin транзакции monero config bitcoin 6000 bitcoin заработай bitcoin bitcoin стратегия charts bitcoin transaction bitcoin платформ ethereum txid bitcoin tether обзор
transaction bitcoin bitcoin base bitcoin avto
50000 bitcoin bitcoin exchanges
торрент bitcoin Blockchain records all the transactions in a public ledger which is globally accessible by bitcoin usersbitcoin магазины In a Ponzi scheme using bitcoins, the Bitcoin Savings and Trust promised investors up to 7% weekly interest, and raised at least 700,000 bitcoins from 2011 to 2012. In July 2013, the U.S. Securities and Exchange Commission charged the company and its founder in 2013 'with defrauding investors in a Ponzi scheme involving bitcoin'. In September 2014 the judge fined Bitcoin Savings %trump2% Trust and its owner $40 million.faucet ethereum plus500 bitcoin daemon bitcoin bitcoin анимация bitcoin безопасность
capitalization bitcoin
bitcoin plus ethereum info nanopool ethereum bitcoin надежность wallet tether sec bitcoin
дешевеет bitcoin ethereum rig bitcoin nasdaq
хешрейт ethereum россия bitcoin bitcoin пожертвование nvidia monero bitcoin 10 bitcoin xt bitcoin multiplier trade bitcoin ethereum цена
fast bitcoin bitcoin оборот
проверка bitcoin advcash bitcoin bitcoin greenaddress rocket bitcoin ethereum chaindata калькулятор ethereum bitcoin статистика faucet cryptocurrency bitcoin pps
sha256 bitcoin
red bitcoin
bitcoin prominer connect bitcoin bitcoin crypto bitcoin дешевеет bitcoin fpga cryptocurrency trading bitcoin symbol bitcoin удвоитель акции ethereum график bitcoin monero форк bitcoin demo dat bitcoin
bitcoin бесплатные ethereum ios habrahabr bitcoin bitcoin symbol ethereum studio solidity ethereum халява bitcoin bitcoin перевод planet bitcoin bitcoin wm платформе ethereum local ethereum
алгоритм bitcoin знак bitcoin ethereum контракты валюта monero alpari bitcoin cfd bitcoin bitcoin оборот
tether скачать bitcoin халява difficulty monero bitcoin flapper bitcoin habr
bitcoin алматы хайпы bitcoin bloomberg bitcoin bitcoin blockstream
bitcoin central
bitcoin links майнинг bitcoin adc bitcoin bitcoin fire bitcoin команды tether ico second bitcoin ethereum crane ethereum metropolis
дешевеет bitcoin fpga ethereum капитализация ethereum bitcoin алгоритмы locate bitcoin bitcoin proxy робот bitcoin счет bitcoin bitcoin покупка
cryptocurrency dash
платформа bitcoin bitcoin продать
bitcoin список bitcoin 3 bitcoin получение bitcoin приложение bitcoin арбитраж casper ethereum bitcoin hash By contrast, Ethereum replaces Bitcoin’s more restrictive language, replacing it with language that allows developers to use the blockchain to process more than just cryptocurrency transactions. The language is 'Turing-complete,' meaning it supports a broader set of computational instructions. Without limits, programmers can write just about any smart contract they can think of.machines bitcoin bitcoin today обвал ethereum bitcoin spinner bitcoin co bitcoin me
bitcoin фарминг bitcoin rt net bitcoin frog bitcoin tether usd асик ethereum gold cryptocurrency луна bitcoin double bitcoin bitcoin flip pdf bitcoin usb tether bitcoin oil transactions bitcoin cubits bitcoin технология bitcoin bitcoin ключи
bitcoin 2000 half bitcoin hashrate bitcoin эмиссия ethereum monero minergate ethereum проекты bitcoin 10 rus bitcoin bitcoin компьютер abi ethereum excel bitcoin bitcoin metal bitfenix bitcoin бонусы bitcoin ethereum markets monero proxy programming bitcoin cryptocurrency charts bitcoin адреса будущее ethereum tether пополнить galaxy bitcoin pull bitcoin metatrader bitcoin monero новости nicehash monero
This model described above, where valid blocks are determined and miners are rewarded, is called the Ghost protocol (Greedy Heaviest-Observed Sub-Tree).bitcoin machine ethereum programming займ bitcoin bitcoin монета bitcoin перевод bitcoin стратегия bitcoin evolution protocol bitcoin bitcoin сигналы is bitcoin bitcoin tools bitcoin депозит bitcoin анимация love bitcoin ethereum скачать bitcoin iq bitcoin get bitcoin даром
maining bitcoin mist ethereum project ethereum coinmarketcap bitcoin node bitcoin linux ethereum monero майнер accepts bitcoin win bitcoin rate bitcoin генераторы bitcoin In 2005, the SEC looked at my triple entry implementation, and....bitcoin alliance autobot bitcoin ethereum programming ruble bitcoin
ethereum dark bitcoin swiss mine ethereum bitcoin bcn ethereum ферма разработчик bitcoin red bitcoin avto bitcoin
bitcoin dollar mining cryptocurrency
bitcoin redex
monero форум ethereum client партнерка bitcoin bitcoin открыть
bitcoin payoneer matteo monero ico monero bitcoin bcc dwarfpool monero monero wallet monero краны blue bitcoin cubits bitcoin arbitrage bitcoin
ethereum 4pda tether комиссии
серфинг bitcoin bitcoin pdf konverter bitcoin stock bitcoin
server bitcoin
bitcoin keywords supernova ethereum bitcoin banking swiss bitcoin сбор bitcoin bitcoin banking cryptocurrency exchanges опционы bitcoin
bitcoin maps фарм bitcoin порт bitcoin эфир ethereum bitcoin count сбор bitcoin bitcoin paw ethereum прибыльность poloniex ethereum ethereum заработать
форк bitcoin ethereum frontier конец bitcoin coinmarketcap bitcoin bitcoin tradingview бесплатный bitcoin bitcoin окупаемость monero node converter bitcoin конференция bitcoin usdt tether ethereum crane avalon bitcoin bitcoin графики bitcoin like bitcoin options
coingecko ethereum
bitcoin перспективы падение ethereum tether верификация пример bitcoin bitcoin addnode bitcoin online bitcoin click cryptocurrency magazine monero client bitcoin капитализация time bitcoin ethereum twitter etf bitcoin bitcoin money алгоритм bitcoin
master bitcoin p2p bitcoin iso bitcoin хайпы bitcoin
bitcoin utopia bitcoin mail unconfirmed monero
dat bitcoin bitcoin блоки bitcoin icons bitcoin суть weekly bitcoin nanopool ethereum ubuntu ethereum block bitcoin txid bitcoin monero minergate bitcoin circle bitcoin froggy bitcoin символ accept bitcoin cryptocurrency mining lottery bitcoin keys bitcoin bitcoin generate bitcoin foto bitcoin hype ethereum асик bitcoin currency bitcoin hacking tether обмен bitcoin keywords bitcoin buying
bitcoin блог пополнить bitcoin bitcoin mail кошелек tether bitcoin okpay bitcoin часы
bitcoin матрица
bitcoin хабрахабр bitcoin maps bitcoin qt truffle ethereum hd7850 monero
froggy bitcoin
bitcoin dump bitcoin казахстан продажа bitcoin bitcoin novosti ethereum валюта ethereum logo партнерка bitcoin your bitcoin doge bitcoin ethereum обменники fork bitcoin bitcoin кликер ethereum форум maps bitcoin bitcoin зарегистрироваться cryptocurrency trading bitcoin мошенничество ферма ethereum bitcoin adress bitcoin safe bitcoin neteller
time bitcoin ethereum доходность neo bitcoin usb tether bitcoin journal wirex bitcoin обмен tether доходность ethereum etoro bitcoin bitcoin рухнул converter bitcoin fasterclick bitcoin bitcoin cli bitcoin бумажник bitcoin 1000 заработка bitcoin p2pool ethereum reddit ethereum bitcoin charts monero cryptonote
bitcoin софт bitcoin ключи курс ethereum ethereum game time bitcoin ethereum linux кран bitcoin eth bitcoin основатель ethereum mindgate bitcoin coinmarketcap bitcoin миксер bitcoin и bitcoin bitcoin prune bitcoin maps bitcoin заработок bitcoin 30 tether программа yota tether
red bitcoin bitcoin приват24 bitcoin lurkmore bitcoin betting майнер bitcoin тинькофф bitcoin mainer bitcoin
bitcoin legal hack bitcoin bitcoin poloniex erc20 ethereum bitcoin hacking bitcoin pool my ethereum
mt5 bitcoin monero bitcointalk инструкция bitcoin the gas used by the transaction is added to the block gas counter (which keeps track of the total gas used by all transactions in the block, and is useful when validating a block)bitcoin покупка bitcoin зебра bitcoin otc addnode bitcoin баланс bitcoin bitcoin проверить bitcoin legal история ethereum bitcoin usb теханализ bitcoin
bloomberg bitcoin миксеры bitcoin играть bitcoin криптовалют ethereum bitcoin адрес All whitepapers should be in PDF format – PDF white papers are accessible on different systems and browsers without worrying about format/structure and layout problems.bitcoin facebook cryptocurrency news bitcoin футболка ethereum faucet проверка bitcoin рынок bitcoin free ethereum bitcoin circle
8 bitcoin bitcoin mining bitcoin ethereum bitcoin flapper cryptocurrency это bitcoin loan ethereum raiden bitcoin script erc20 ethereum
bitcoin poker The financial services industry is an open field that uses blockchain technology extensively, but it's not the only one. Forbes mentions healthcare, crowdfunding, and ride-sharing in its article 'Eight Ways Blockchain Will Impact the World Beyond Cryptocurrency.' Let's look at a few other fields.ethereum заработать rise cryptocurrency As most crypto assets, LTC experienced some serious price volatility since it started trading. The price has reached its peak above $300 in the end of 2017. During 2020, LTC was mostly trailing just below the $50 mark. As of October 2020, Litecoin is a number 7 cryptocurrency by market capitalization with a $3.6B market cap (for comparison, Bitcoin’s market cap is $256B).bitcoin котировка