The digitized currencies of the central banks of states, that is, their stablecoins, will definitely not be able to replace and make useless a decentralized cryptocurrency. They have completely different tasks and principles of functioning. The cryptocurrency was just created as an alternative to the existing payment system, and the stable coin of states, in fact, is only a kind of non-cash payments of this state. We see that even private and commercial stablecoins do not claim to replace cryptocurrencies.