Cryptocurrency is digital currency that is based on cryptography. Cryptography does cryptocurrency practically impossible for an imitation. Cryptocurrencies are based on small technology, called блокчейн. She is transparent, decentralized, protected from an unauthorized division and managed people, but not establishments. A difference between traditional money and cryptocurrencies consists in that cryptocurrencies intended for the decision of some problems into that the money system runs in a that kind, what we know her in, from centralization to inequality, corruption and, certainly, inflation.