Do not trash Fiat yourself when it's actually needy, crypto and Fiat must co-exists until the government decide to go digital with Fiat themselves, and Fiat is not trash.
Then who said fiat trash.
Fiat money is legal in every country, even crazy people don't want to say and throw away fiat, what's more for sane people, crypto is currently still being exchanged for fiat, not all shopping facilities and places in every country carry out transactions with digital currency, fiat is the main basis as a sale/purchase transaction of goods, crypto is only a means of digital currency to be traded on the internet, there is no crypto internet access there is nothing to do, fiat remains, if the internet in this world perishes, fiat will still be used.
We all know fiat is a source of needs and the economy of people around the world, the economy develops thanks to the exchange of fiat with goods, not with crypto, so whatever happens fiat remains as usual.