It's not about people's belief in paper money. Paper money is issued by the state and is guaranteed by the state as a method of payment for any transactions on its territory. The circulation of digital currency, cryptocurrency is not yet guaranteed by anything and anyone. Only by the general availability of blockchain technology. The statement that cryptocurrency is simple and reliable is not yet true. Cryptocurrency is still quite difficult for ordinary people to understand, both in theory and in practical use. Cryptocurrency is not only a simple transfer of funds from one address to another. Here, first of all, you need to have extensive knowledge in order to protect it from hackers and scammers and prevent numerous mistakes. In addition, it is still developing rapidly and therefore the rules for working with it are rapidly changing. Therefore, working with cryptocurrency is actually not as easy as it seems at first glance.