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.
Yes, it will take several time or years before fiat to be elliminated considering other people who don't know yet about crypto because they don't have access of it no internets and no gadgets. Don't worry my friend.
Fiats cannot be eliminated, do not deceive yourself. Even if it will, it won't be this generation. There are so many places a countries in the world right now where they are secluded from the things going on in the technological space and the only thing they simply rely on is the way things are being done already.
That is even by the way, no government will ever want to give up control and one way or the other, and they will find a means to either make both the fiat and crypto space go concurrently or find a way to pull it down.