Several countries already use the dollar like El Salvador, Cambodia, Ecuador, Panama. Cambodia and Panama use local currency in sub $1 amounts only, and El Salvador and Ecuador were exclusively USD until E.S added BTC, but I know from locals there that it's rarely used and USD is still king. Argentina wouldn't be the first but it would be the biggest. My question is what happens when/if a country this big tries to dollarize? Will there be a huge demand affecting USD rates? Would we just ship them container loads of banknotes? Does the US even want this and can US officials just say no?
Bonus question: Why not Euros?