Cryptocurrency can develop only if it is legalized by states. Legalization means determining the legal status of a cryptocurrency, as well as establishing the rules and conditions for its circulation within the state. Therefore, the establishment of such rules is inevitable. After all, the cryptocurrency, existing in the virtual world, must go in our physical world and on the territory of states. Therefore, the regulation of the circulation of cryptocurrencies by the states is mandatory if we do not want it to be a shadow market. Here only we have to fight for such regulation to be reasonable.