In fact, the cryptocurrency does not affect the national currencies of states. No matter how cryptocurrency develops, it will exist only in parallel with fiat and will not be able to replace it. This issue is completely under the control of states and their governments. On the one hand, they will strictly control the procedure and conditions for the circulation of the cryptocurrency, and on the other hand, only they can also make any decisions regarding their national currency. Therefore, the cryptocurrency has absolutely no chance of replacing the common currency of states.