Personally, I believe in crypto currency and blockchain technology.  We live in the time of technology development. The world does not stand still. Humanity is increasingly seeking to get rid of unnecessary things, the use of which takes people a lot of time and effort. Therefore, it is only natural that there is development in this direction. Soon we will no longer need fiat and humanity will replace it with crypto currency. For more than a year, rich people (including the governments of many countries) have accumulated bitcoin.
So we stand only at the beginning of this fascinating future.