From what I have seen so far in this forum and other crypto platforms, most of us want fiat eliminated. But let us not forget that there are still situations whereby we can't use crypto except fiat like in rural places without computers or even internet facilities.
Fiat will not disappear, technology has not yet penetrated every part of the country. and also the government still desperately needs fiat as a payment and the value of their economy. In modern financial transactions, digital currency is better in terms of speed ,although we also cannot forget fiat.