Bitcoin is the unit of account of a peer-to-peer payment system. The difference of the system is the electronic payment between two participants without the presence of a third (Bank, government agencies), in which no one can intervene, forcibly make, challenge or cancel the transaction. The popularity of bitcoin has led to the fact that it is successfully bought and sold through online services. How bitcoin exchange works is easy to understand. To begin with, it is worth knowing that the exchange is in fact a banal service for the exchange of digital currency (bitcoin) to other types of assets, and first of all – national currencies. Transactions are sometimes performed with insufficient technical protection, and the legal side of the case does not allow to protect ’traders’ from hacking and theft of cryptocurrencies. The most famous sites are Mt.Gox, Cryptsy, BTC-E, Bitfinex, Chinese OKCoin, Huobi, BTC China (each of them per day vary from 100 to 200 thousand bitcoins – according to the 2015 year). The so-called margin bitcoin trading, which is typical for ordinary stock exchanges, is also possible on the platforms. 9749
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