Satoshi Nakamoto identified the main goal of bitcoin – the creation of an alternative financial system, more perfect, excluding financial transactions of intermediaries (banks, payment systems, etc.). The main task is the ease of use, security, the ability to send digital money to another user quickly and anonymously. And if in 2009 this idea seemed to be something dangerous, illegal, unreliable, and having no future, today even the most remote people from this topic know about bitcoin. In addition to the "cue ball", other cryptocurrencies are also represented on the market, which is perfectly "squeezed" into our normal life. Today, most cryptocurrencies are used for passive income (sale and purchase), trading on the stock exchange, storage, and transactions (among which salary ones are also noted).