Cryptocurrency is a kind of digital currency, accounting for internal units of account of which is provided by a decentralized payment system (there is no internal or external administrator or any of its analogues), operating in fully automatic mode. By itself, the cryptocurrency does not have any special material or electronic form – it is just a number indicating the amount of data of settlement units, which is recorded in the corresponding position of the information packet of the data transfer protocol and often is not even encrypted, like all other information about transactions between the addresses of the system. Keywords: Cryptocurrency, bitcoin, market, exchange, code, world economics, blockchain, technology, inflation, momentum, network, financial pyramids, mining.