actually not many want to eliminate fiat currency. in my opinion, crypto currency and fiat should go side by side, because crypto will be increasingly recognized. maybe you see a lot of people who want fiat currency to be replaced with crypto, but believe it is hard to happen.
Of course, we have to admit that we still need fiat? crypto that you are proud of still cannot be used as a major currency,
the reason is there are still limits to its use. so anyone won't be able to replace fiat as the main currency, and then replace to bitcoin ?