in my opinion to replace the fiat currency is not possible because the legality of the crypto currency is not recognized by all countries in this world and they still believe in the fiat currency of course
I am agree, many government still ban and prohibit cryptocurrency. If crypto replacing fiat, its hard to measure economic growth. I think fiat money still needed in our economic system because its need long time for people understand about cryptocurrency
They don't need a long tine really.
There are a lot of people that understands what Bitcoin is and what it can do. To be honest, it only takes a short period of time for people to understand it since it is not that hard to understand. The only problem is that the government thinks that they know better and they think that it will really be a bad thing for their people the reason they are banning them.