How long do you think will the cryptocurrency be popular? Does she substitution the usual fiat money? How many years will pass before this?
I believe crypto will last very long, but it might never replace fiat currency.
I think the main attraction of this industry is its fluctuations, which of course will not be suitable for offering a global currency.
I also think that crypto will still survive and develop well but cannot replace fiat, crypto continues to run according to function and prices are also unstable, and for nations that have high technology and intelligent society, crypto will be an easy and comprehensive exchange tool.