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 totally eliminated without the proper coordination with all the concerns. It will take decade before this will happen and considering that not all country had supported crypto it's still a big question for full implementation of crypto.