i have traveled and lived many countries myself seen things seen life from my perspective the currencies might fall yes but saying that usa dollar will be devalued i can tell you that china yuan is less useless then USD the usa dollar still has big market.
usa dollar is king of the fiat curriencies and btc is king of crypto.
Before the dollar falling there might many other currencies what can fall down first i think so.
i think russian ruble and usa dollars are both very needed since russia got resources what everybody want and usa is just reservecurreny.
Yeah, at least not for now as I mentioned
year by year, I'll just say that since china is the 2nd richest by GDP after US, and look how they managed this pandemic regardless where the virus origins while other including USA are still struggling
im not scientist so i dotn have clue about if the usa dollar crash or any other currencies crashing....
all i know i have dollars i go to shop and buy food anything with dollars not bitcoins.
i dont have clue if usa dollar will be replaced or not really dont know but i know with dollars i buy shit.