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, for now indeed there are still many villages in various countries that have not been reached by the internet or computer facilities. if in the future, maybe the technology is more advanced and the internet will almost reach all parts of the entire country. if so, using crypto is indeed very effective and more sophisticated.
but, remember that there are still things that are not very effective at using crypto. like buying cheap goods or services I think I have to use fiat. after all fiat or paper money is the identity of the country so that it is different from other countries.