There are hundreds of varieties of cryptocurrencies, but the very first and currently still the most popular is bitcoin. Since its inception, it has been in the growth stage almost all the time, and its exchange rate fluctuations compared to fiat currencies are completely insignificant. This crypto almost never falls in price, so the loss of funds when storing them in bitcoin is almost excluded. In addition, if necessary, bitcoin can be exchanged for cash at any time in any city in the world online, for example, for eur. An important factor is that all transactions are anonymous and tax-free.