Fiat has existed for hundreds of years, it is extremely important and irreplaceable. Bitcoin is electronic money, it's growing and getting better and better. Bitcoin has some benefits that Fiat does not have. I think bitcoin and fiat will exist together, support each other.
frankly, these two currencies provide tremendous benefits in their fields. Bitcoin can be exchanged with FIAT and vice versa so that giving us convenience can all be used for transactions. Bitcoin and FIAT will still be liked by the public.