If and when cryptocurrency finally becomes an official global currency, how do you think it will affect the global economy and the economy of each countries? Will it help improve the economy better than fiat or will it still need help from fiat?
I don't see any major impact happening as bitcoins is present in almost all global countries, they're coexisting well without causing any impact on each other. If you see even now people are yet choosing fiat over bitcoins, it's cause many people don't understand bitcoins, plus it's limited so it can't help to improve the economy, it can lead to chaos if only few person own it. Bitcoins will always be traded for fiat, so it'll not be able to create any impact without fiat.