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.
Don't you worry it will take a long time before everyone will used cryptocurrency and will eliminate fiat currency because most countries are supporting fiat currency rather than cryptocurrency, that is why it is imposible for fiat currency will be eliminated.