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.
This is what I'm also telling to others that want to replace fiat totally. This would be a problem to regular day to day trade of goods and services since Bitcoins and other altcoins price is so volatile, people would adjust prices too often. Making bitcoin fiat/paper would be just a waste of resources, it breaks the idea of it being a digital mode of payment. What we need is for it to grow but not totally replace existing currencies.