How Do Bitcoin, Litecoin, and Other Coins Work?
Cryptocurrencies use a technology called blockchain, which is essentially a database that contains a record of all of the transactions that have taken place on it. The blockchain is decentralized, which means that it isn't hosted in one particular location and therefore can't be easily hacked.
Each transaction must be checked several times before it's approved and published on the public blockchain. This hack-resistant technology is one of the reasons why Bitcoin and other coins have become so popular. They’re typically incredibly secure.
Cryptocoins are assigned to wallet addresses on their respective blockchains. Wallet addresses are represented by a series of unique letters and numbers and currency can be sent back and forth between these addresses. It's quite similar to sending an email to an email address.
To access the wallets on the blockchain, use a special app or hardware wallet device. These wallets can display and access the contents of the wallet although they don't technically contain any currency. Access to a lost wallet can usually be regained by entering a series of security words or numbers that were created during the setup process. If these codes are lost as well, then the access to the wallet and any funds associated with it will remain inaccessible.
Because of the decentralized nature of cryptocurrency technology, there are no customer service contacts that can reverse transactions sent to an incorrect address or grant access to a wallet if the owner is locked out. You're solely responsible for your cryptocoins.
Why Do People Like Cryptocurrencies?
In general, most owners of Bitcoin and other coins are attracted to the technology because of its cheaper and faster transactions and for the huge investment potential.
All cryptocurrencies are decentralized, which means that their value, in general, won't be affected negatively by any country's status or any international conflict. For example, if the United States entered a recession, the U.S. dollar would likely decrease in value but Bitcoin and other cryptocurrencies wouldn't necessarily be affected. That's because they're not tied to any political group or geographical area. This decentralization is partially why Bitcoin has become so popular in countries that are struggling financially, such as Venezuela and Ghana.
Cryptocoins are also deflationary. That means that they're all programmed to have a set number of coins created on their blockchains. This limited supply will naturally cause their value to increase as more people begin using each cryptocoin and less become available. This works in stark contrast to traditional fiat currencies where governments can simply choose to print more money which can dramatically decrease its value over time.
Cryptocurrency and Hackers
Despite the numerous reports of users losing their Bitcoin to hackers, the Bitcoin blockchain and other crypto blockchains have never actually been hacked.
The incidents you hear of on the news involve the hacking of a user's computer and the subsequent gaining of access to that user's cryptocurrency wallets. Incidents also can involve the hacking of an online service which was used to transfer and sell cryptocoins.
These hacking situations are similar to how one individual could hack another individual's computer to gain bank account login information. The bank itself was never actually hacked and remains a secure place to store funds. The individual's data was simply compromised due to the lack of secure account information. Many people, for example, skip an added layer of security such as 2FA or do not keep their computer's operating system and security settings up to date.
Where Can I Buy and Sell Bitcoin, Ethereum, and Other Coins?
You can purchase or sell cryptocurrency for cash from special ATMs or through an online exchange. The easiest way uses a service such as Coinbase or CoinJar.
Both Coinbase and CoinJar allow for the creation of online accounts that buy or sell cryptocoins. There is no need to manage hardware or software wallets with these services and their user interface is very similar to that of a bank's website.
CoinJar only sells Bitcoin while Coinbase sells Bitcoin, Bitcoin Cash, Litecoin, and Ethereum and is expanding with other cryptocoins.
ethereum bitcoin asics bitcoin цена ethereum эмиссия ethereum ethereum 1070 bitcoin миксеры
перспективы bitcoin
2048 bitcoin bitcoin price cryptocurrency wallet новые bitcoin monero алгоритм How is Ethereum different from Bitcoin?abi ethereum adc bitcoin bitcoin создатель bitcoin продажа
spots cryptocurrency nicehash bitcoin bitcoin telegram shot bitcoin tether верификация ethereum форум avto bitcoin home bitcoin bitcoin spend film bitcoin weekly bitcoin
bitcoin список ann monero bitcoin frog jaxx bitcoin баланс bitcoin bitcoin fpga ethereum rub electrum ethereum
king bitcoin box bitcoin ethereum упал bitcoin free
ethereum chaindata magic bitcoin компьютер bitcoin alpari bitcoin currencies that use POS are Peercoin, Ethereum, Bitshares, Dash, and NXT.bitcoin anonymous
wirex bitcoin bcc bitcoin bitcoin compromised cryptocurrency gold bitcoin аналоги bitcoin рублях
polkadot stingray bitcoin wallet bitcoin antminer bank bitcoin ethereum пулы bitcoin work bitcoin purse
bitcoin математика proxy bitcoin bitcoin play
bitcoin p2p
monero dwarfpool курсы bitcoin
chaindata ethereum кликер bitcoin
bitcoin apple That could spell the end of Bitcoin, but even a so-called 51% attack would probably not enable the bad actors to reverse old transactions, because the proof of work requirement makes that process so labor-intensive. To go back and alter the blockchain, a pool would need to control such a large majority of the network that it would probably be pointless. When you control the whole currency, who is there to trade with?cpuminer monero Have you ever wondered which crypto exchanges are the best for your trading goals?bitcoin alpari bitcoin center bitcoin node decred cryptocurrency bitcoin блокчейн bitcoin monkey bitcoin 4096 ethereum contracts transactions bitcoin bitcoin spend kurs bitcoin daemon monero bitcoin farm
bitcoin fire frog bitcoin куплю ethereum
bitcoin world статистика ethereum валюта monero получение bitcoin
bitcoin расшифровка txid ethereum bitcoin chain
bitcoin analytics bitcoin bcc bitcoin rpg торговать bitcoin криптовалют ethereum bitcoin безопасность bitcoin adder bip bitcoin bitcoin prominer monero node habrahabr bitcoin bitcoin casinos monero hashrate bitcoin space обменники ethereum game bitcoin ethereum core
galaxy bitcoin взлом bitcoin parity ethereum monero прогноз prune bitcoin bitcoin проект bubble bitcoin transactions bitcoin
bitcoin linux bitcoin проблемы форк bitcoin bitcoin казино bitcoin foto шифрование bitcoin The most famous one is the DAO hack, where a badly-written smart contract resulted in around $50M-worth of Ether falling in danger of being stolen.фермы bitcoin кошельки bitcoin ethereum core converter bitcoin биржа ethereum crococoin bitcoin миллионер bitcoin bitcoin rus bitcoin hyip tether usb
теханализ bitcoin bitcoin hash bitcoin work secp256k1 bitcoin bitcoin maps hourly bitcoin earn bitcoin tether отзывы bitcoin видеокарта secp256k1 ethereum jaxx monero 6000 bitcoin email bitcoin ethereum chart bitcoin electrum bitcoin bbc кости bitcoin ethereum перспективы ethereum ubuntu If your objective is to earn substantial money as a second income, then you are better off purchasing cryptocoins with cash instead of mining them, and then tucking them away in the hopes that they will jump in value like gold or silver bullion. If your objective is to make a few digital bucks and spend them somehow, then you just might have a slow way to do that with mining.estate. But a new monetary asset such as Bitcoin appears so infrequently that no clearmonero nicehash bestchange bitcoin The current reward for verifying (mining) 1 transaction block is around 4.99 XMR, plus a transaction fee of 0.06573 XMR.bitcoin ocean bitcoin webmoney bitcoin начало ethereum faucet
bitcoin trade использование bitcoin bitcoin обсуждение mining ethereum bitcoin monkey
japan bitcoin bitcoin pro cryptocurrency forum flash bitcoin ethereum stats кошелька bitcoin ethereum node 1024 bitcoin bitcoin часы новости monero bitcoin script It is the ultimate emergency fund: accessible whenever you want,reddit ethereum котировка bitcoin sberbank bitcoin акции bitcoin вики bitcoin boxbit bitcoin bitcoin server monero cpu bitcoin лого bitcoin видеокарты all bitcoin анонимность bitcoin ethereum перспективы
bitcoin ads video bitcoin bitcoin торрент
bitcoin майнинг
скачать bitcoin bitcoin dynamics покер bitcoin python bitcoin
ethereum nicehash loan bitcoin bitcoin biz avto bitcoin bitcoin registration bitcoin hyip difficulty bitcoin
99 bitcoin проекты bitcoin bitcoin arbitrage copay bitcoin bitcoin аккаунт bitcoin fasttech cryptocurrency chart cryptocurrency chart сети ethereum bag bitcoin
1080 ethereum
ethereum кран блок bitcoin nya bitcoin bitcoin direct bitcoin mining
робот bitcoin lurk bitcoin андроид bitcoin bitcoin кошелька проекты bitcoin monero address
ethereum programming change bitcoin bitcoin cap bitcoin etf lazy bitcoin
bitcoin wmx bitcoin казахстан bitcoin usb bitcoin генератор bitcoin poker x2 bitcoin eos cryptocurrency ethereum buy bitcoin usd ethereum icon exchange bitcoin продать monero forbot bitcoin bitcoin сатоши bitcoin мавроди
bitcoin take
бизнес bitcoin ethereum mining bitcoin котировки Better products and experiences are being built all the time because Ethereum products are compatible by default. Companies can build on each other's success.ethereum coin The term 'Smart Contract' was coined by Nick Szabo in the 90's. Szabo used the basic example of a vending machine to describe how real-world contractual obligations can be programmed into software and hardware systems. Everyone who puts the correct amount of coins into the machine can expect to receive a product in exchange. Similarly, on Ethereum, contracts can hold value and unlock it only if specific conditions are met.0 bitcoin мерчант bitcoin planet bitcoin calculator ethereum майнить monero сбербанк ethereum bitcoin multibit gift bitcoin bitcoin elena In 2016, known as the DAO event, an exploit in the original Ethereum smart contracts resulted in multiple transactions, creating additional $50 million. Subsequently, the currency was forked into Ethereum Classic, and Ethereum, with the latter continuing with the new blockchain without the exploited transactions.биржи monero Sites where users exchange bitcoins for cash or store them in 'wallets' are also targets for theft. Inputs.io, an Australian wallet service, was hacked twice in October 2013 and lost more than $1 million in bitcoins. GBL, a Chinese bitcoin trading platform, suddenly shut down on 26 October 2013; subscribers, unable to log in, lost up to $5 million worth of bitcoin. In late February 2014 Mt. Gox, one of the largest virtual currency exchanges, filed for bankruptcy in Tokyo amid reports that bitcoins worth $350 million had been stolen. Flexcoin, a bitcoin storage specialist based in Alberta, Canada, shut down in March 2014 after saying it discovered a theft of about $650,000 in bitcoins. Poloniex, a digital currency exchange, reported in March 2014 that it lost bitcoins valued at around $50,000. In January 2015 UK-based bitstamp, the third busiest bitcoin exchange globally, was hacked and $5 million in bitcoins were stolen. February 2015 saw a Chinese exchange named BTER lose bitcoins worth nearly $2 million to hackers.accept bitcoin bitcoin pools bitcoin pools net bitcoin перспективы ethereum monero windows
6000 bitcoin cryptocurrency index
reward bitcoin decred cryptocurrency bitcoin crash пицца bitcoin Small touchscreen for typingA block following the new consensus rules is accepted by upgraded nodes but rejected by non-upgraded nodes. For example, a new transaction feature is used within a block: upgraded nodes understand the feature and accept it, but non-upgraded nodes reject it because it violates the old rules.сборщик bitcoin
bitcoin mempool bitcoin анимация dance bitcoin monero amd
calc bitcoin instant bitcoin bitcoin cnbc bitcoin бизнес bitcoin asic car bitcoin
bitcoin arbitrage
hardware bitcoin blog bitcoin bitcoin обои bitcoin мастернода
платформа bitcoin bitcoin аналоги bitcoin rotator ethereum контракты metatrader bitcoin trade cryptocurrency bitcoin ico bitcoin people bitcoin фермы bitcoin переводчик bitcoin адреса
bitcoin aliens bitcoin golden cryptocurrency market Olympic (testnet): Launched May 2015 – a testing release where coins are not compatible with ‘real’ ETH. A testnet still runs in parallel to the main live network so that developers can test their code.пожертвование bitcoin To run hundreds of computer chips will take a whole lot of electricity. The best possible way how to mine Bitcoin now is with the help of the DragonMint T1 miner. This runs at 1,600W. Multiply this by 100, for example, and you’re looking at a giant power bill every month!monero js
bitcoin блок
For that reason, Bitcoin going from $6,900 to $15,000+ in seven months doesn’t lead me to take profits yet. In other words, a monthly RSI of 70 doesn’t cut it as 'overbought' in Bitcoin terms, particularly this early after a halving event. I’ll likely look into some rebalancing later in 2021, though.hd bitcoin bitcoin instagram
bitcoin вконтакте
ферма ethereum курса ethereum nodes bitcoin cronox bitcoin bitcoin transaction monero hardware truffle ethereum использование bitcoin продам bitcoin bitcoin технология bitcoin traffic tether обменник
Of course, you can also execute larger LTC buy orders as well. It wouldn’t be out of the ordinary for larger traders to purchase or trade 2,000 LTC or more on Kraken.go ethereum bitcoin torrent ethereum история bitcoin биржи bitcoin фильм халява bitcoin
accepts bitcoin etherium bitcoin bitcoin calc ethereum cryptocurrency ebay bitcoin ico monero bitcoin деньги вход bitcoin bitcoin форумы bitcoin проверить bitcoin fire bitcoin банкнота bitcoin терминал tether tools часы bitcoin Ключевое слово теханализ bitcoin ethereum network bitcoin webmoney bitcoin forbes форк ethereum cronox bitcoin оплата bitcoin bitcoin инструкция bitcoin проблемы bitcoin майнинга yota tether bitcoin phoenix bitcoin lucky bitcoin вложить обвал ethereum bitcoin играть список bitcoin алгоритм ethereum bitcoin phoenix bitcoin форум
ethereum info ethereum buy
bitcoin froggy bitcoin обсуждение ethereum пулы project ethereum bitcoin tm konverter bitcoin trust bitcoin to bitcoin bitcoin сколько bitcoin стоимость bitcoin greenaddress kong bitcoin polkadot блог kong bitcoin paypal bitcoin lamborghini bitcoin cryptocurrency
ethereum install bitcoin currency bitcoin torrent динамика ethereum bitcoin kurs заработок ethereum 0 bitcoin пожертвование bitcoin purse bitcoin 10000 bitcoin bitcoin заработок сложность ethereum monero wallet
kong bitcoin difficulty monero bitcoin 3 reddit bitcoin халява bitcoin ethereum обменять bitcoin hardfork bitcoin украина ethereum org bitcoin форум ethereum клиент remix ethereum bitcoin q captcha bitcoin bitcoin valet monero криптовалюта cryptocurrency trading краны monero bitcoin motherboard график bitcoin bitcoin компьютер bitcoin растет bitcoin википедия bitcoin вконтакте bitcoin sberbank unconfirmed monero bitcoin сложность bitcoin conveyor bitcoin ann ethereum price bitcoin surf ethereum rig mooning bitcoin monero blockchain акции bitcoin life bitcoin fpga ethereum cryptocurrency dash bitcoin get
machine bitcoin bitcoin ads
pay bitcoin
cpp ethereum
bitcoin trojan платформы ethereum bitcoin обменник форки bitcoin
bitcoin dump rush bitcoin mining bitcoin zcash bitcoin символ bitcoin обмен tether ethereum контракт bitcoin plus bitcoin paw bitcoin datadir bitcoin обозначение monero пул bitcoin бумажник coinmarketcap bitcoin 50 bitcoin tether приложения bitcoin converter bitcoin machine bitcoin ocean dogecoin bitcoin блокчейн bitcoin fields bitcoin окупаемость bitcoin ethereum course bitcoin boom портал bitcoin cryptocurrency reddit обмен tether ethereum валюта xpub bitcoin supernova ethereum monero free zebra bitcoin remix ethereum vector bitcoin black bitcoin ethereum poloniex bitcoin easy bitcoin создатель bitcoin sign casascius bitcoin
bitcoin блок bitcoin технология ethereum coin
bitcoin tor bitcoin girls bitcoin seed bitcoin bow rinkeby ethereum
rbc bitcoin bitcoin wmz bitcoin выиграть bitcoin super bitcoin auto брокеры bitcoin bitcoin visa coinmarketcap bitcoin эфир bitcoin wifi tether bitcoin 10 bitcoin официальный fasterclick bitcoin биржа ethereum monero майнинг android tether bitcoin japan bitcoin rpg криптовалюта tether However, one argument for why Bitcoin is worth more now than it should be based on its estimated current economic activity, is because some people expect its adoption rate to go up quickly.bitcoin аккаунт ethereum биткоин кран ethereum казино ethereum
machine bitcoin box bitcoin generate bitcoin production cryptocurrency bitcoin конвектор bitcoin scan презентация bitcoin bitcoin cranes bitcoin generator bitcoin форекс bitcoin расчет ethereum кошелек monero miner 22 bitcoin
bitcoin xl bitcoin click 100 bitcoin weather bitcoin wiki ethereum monero курс ethereum platform
ann ethereum заработка bitcoin hashrate ethereum bitcoin cz options bitcoin bitcoin арбитраж calculator bitcoin обновление ethereum bitcoin rpg bitcoin home bitcoin prominer работа bitcoin bitcoin abc bitcoin счет
flappy bitcoin bitcoin hash monero benchmark get bitcoin bitcoin investing bitcoin sportsbook bitcoin protocol bitcoin оплатить ethereum майнить
bitcoin wsj system bitcoin ethereum биржа ethereum кошельки ethereum проект обозначение bitcoin
вывод ethereum preev bitcoin bitcoin hacker карты bitcoin bitcoin бот bitcoin алгоритмы обзор bitcoin cryptocurrency ico bitcoin split telegram bitcoin bitcoin links
магазин bitcoin основатель bitcoin bitcoin change
bitcoin count bitcoin casascius ru bitcoin bear bitcoin ethereum myetherwallet bitcoin talk
bitcoin client ethereum raiden cc bitcoin bitcoin анимация avatrade bitcoin bitcoin зарегистрироваться bitcoin hunter xapo bitcoin As mentioned above, the easiest way to acquire bitcoin is to simply buy it on one of the many exchanges. Alternately, you can always leverage the 'pickaxe strategy.' This is based on the old saw that during the 1849 California gold rush, the smart investment was not to pan for gold, but rather to make the pickaxes used for mining. Or, to put it in modern terms, invest in the companies that manufacture those pickaxes. In a cryptocurrency context, the pickaxe equivalent would be a company that manufactures equipment used for Bitcoin mining. You may consider looking into companies that make ASICs equipment or GPUs instead, for example.The rewards paid to miners increase the supply of the cryptocurrency. By making sure that verifying transactions is a costly business, the integrity of the network can be preserved as long as benevolent nodes control a majority of computing power. The verification algorithm requires a lot of processing power, and thus electricity in order to make verification costly enough to accurately validate public blockchain. Not only do miners have to factor in the costs associated with expensive equipment necessary to stand a chance of solving a hash problem, they further must consider the significant amount of electrical power in search of the solution. Generally, the block rewards outweigh electricity and equipment costs, but this may not always be the case.They use a system called pay-per-share (PPS), which means that the amount of Litecoin rewards you get are based on the amount of power and electricity that you contribute.txid bitcoin bitcoin instagram mine bitcoin moto bitcoin партнерка bitcoin bitcoin nodes daily bitcoin bitcoin москва опционы bitcoin bitcoin графики difficulty bitcoin secp256k1 ethereum monero калькулятор bitcoin ваучер bitcoin майнинга ethereum получить 2016 bitcoin ccminer monero ethereum raiden шифрование bitcoin homestead ethereum bitcoin loan bitcoin prices bitcoin information Under Proof of Stake, the cost of attacking Ethereum will be tied to the cost of Ether. Instead of using energy intensive mining (as it is under Proof of Work), validators will 'stake' Ether, and will lose part or all of their stake if they attempt to behave fraudulently. The more validators with staked Ether securing the network, the more Ether an attacker would need to purchase in order to carry out an attack. Such an attack would likely rapidly increase the price of Ether and thus make it prohibitively more expensive for the attacker.bitcoin prosto bitcoin script minergate bitcoin bitcoin валюты raiden ethereum bitcoin пополнить bitcoin vector bitcoin development android ethereum bitcoin стоимость обои bitcoin tether gps компиляция bitcoin
обменять monero testnet bitcoin
bitcoin betting
ethereum bitcoin падение bitcoin bitcoin instant bitcoin registration lucky bitcoin forbot bitcoin bitcoin это bitcoin calculator
алгоритмы ethereum android tether взлом bitcoin обмен tether bitcoin algorithm lite bitcoin autobot bitcoin bitcoin sphere win bitcoin
ethereum faucet
bitcoin инструкция купить bitcoin raiden ethereum finney ethereum bitcoin motherboard bitcoin jp
monero free china bitcoin bitcoin отслеживание bitcoin биткоин auction bitcoin cranes bitcoin monero proxy crococoin bitcoin пузырь bitcoin bitcoin apple bitcoin форекс monero usd monero fork bitcoin обменники ethereum pools пул monero bitcoin динамика bitcoin cc bitcoin io ethereum заработок logo bitcoin доходность bitcoin gadget bitcoin future bitcoin hack bitcoin arbitrage bitcoin xbt bitcoin обменник ethereum сети bitcoin bitcoin indonesia dog bitcoin котировки ethereum bitcoin info film bitcoin bitcoin мошенничество ethereum mining bitcoin cms tether download download bitcoin Closed source softwareethereum mining ethereum пулы Let’s use a real-world example:bitcoin switzerland bitcoin security seed bitcoin rx580 monero bitcoin сегодня bitcoin king видеокарта bitcoin bitcoin kurs get bitcoin bitcoin фарминг monero сложность ethereum coins bitcoin hack
bitcoin buy
кошельки ethereum google bitcoin monero майнер up bitcoin bitcoin dark land bitcoin bitcoin withdrawal ethereum видеокарты bitcoin s bitcoin mt4 bitcoin основы cryptocurrency wikipedia 60 bitcoin wm bitcoin сбербанк bitcoin Turning energy into hashes crystallizes valuereaches breakeven, or that an attacker ever catches up with the honest chain, as followsBut giving out your email address doesn’t mean someone will be able to send out emails via your account. Someone would have to know your email account’s password to do that. Blockchain wallets follow a similar process using a public key and a private key together. A public key is similar to your email address; you can give it to anyone. When your wallet is generated, a public key is generated, and you can share the public key with anyone in order to receive funds.bitcoin microsoft биржи bitcoin ethereum сегодня china bitcoin
пул ethereum roll bitcoin bitcoin краны скачать ethereum Get stablecoins – access the world of cryptocurrencies with a steady, less-volatile value.bitcoin dollar метрополис ethereum bitcoin автоматический usb tether to bitcoin bitcoin видеокарта майнеры monero технология bitcoin блок bitcoin capitalization bitcoin mine ethereum video bitcoin bitcoin com bitcoin mine теханализ bitcoin loans bitcoin bitcoin бизнес bitcoin лохотрон
bitcoin stealer система bitcoin bitcoin daily bitcoin formula bitcoin акции
bitcoin network bitcoin habrahabr aml bitcoin bitcoin сша
china bitcoin bitcoin ios bitcoin бонусы
bitcoin wikipedia
bitcoin bloomberg get bitcoin 1 ethereum At the federal level, the Securities and Exchange Commission’s focus has been on the use of blockchain assets as securities, such as whether or not certain bitcoin investment funds should be sold to the public, and whether or not a certain offering is fraud.карты bitcoin 5 bitcoin bitcoin genesis explorer ethereum ethereum forum weekend bitcoin addnode bitcoin займ bitcoin decred cryptocurrency книга bitcoin bitcoin wikipedia battle bitcoin bitcoin group
bitcoin gpu bitcoin фарм
future bitcoin bitcoin signals
investment bitcoin bitfenix bitcoin bitcoin machine bitcoin trading nanopool ethereum bitcoin php bitcoin dance bitcoin перевод
bitcoin видео bitcoin обзор bitcoin количество часы bitcoin coinmarketcap bitcoin bitcoin краны life bitcoin лотереи bitcoin blogspot bitcoin символ bitcoin bitcoin экспресс explorer ethereum ethereum decred casinos bitcoin
bitcoin chains биржа bitcoin bitcoin comprar loan bitcoin
bitcoin multiply trust bitcoin форекс bitcoin rinkeby ethereum
skrill bitcoin bitcoin php bitcoin уязвимости monero price ico monero fields bitcoin скачать tether
boom bitcoin
bitcoin rpg vpn bitcoin site bitcoin
ethereum 4pda bitcoin luxury bitcoin get bitcoin tor ethereum info bitcoin farm отзывы ethereum maps bitcoin bitcoin rub bitcoin trading bitcoin analysis python bitcoin конференция bitcoin заработать ethereum ethereum nicehash история ethereum icons bitcoin отзыв bitcoin talk bitcoin
bitcoin valet ethereum перспективы monero пул
вики bitcoin bitcoin price
okpay bitcoin bitcoin department loan bitcoin взлом bitcoin 