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.
It will not happened even for a decade. Don't worry.
Most people here just expecting too much
without looking at the reality and the massive effect of it.
Crypto will grow more but fiat will still be there.
But it is also only a matter of time before there's access to internet and terminals in shops with paypass option everywhere. As more people join the net, cryptos will become more and more useful. Fiat must go away eventually, just as it was created at a specific point of time not that long ago. The idea of not backing up the main currency and allowing potentially infinite supply was doomed at the very beginning. It's just that people couldn't find a better solution back then. As now we have it with a way of predicting the amount and mining coins gradually, we are bound to adopt it.