For me, it's impossible US Dollar would crashes. Even if it crashes, other currency will take over US Dollar place, like Euro or Yuan.
I don't think bitcoin could replace it.
Fiat will just be replace by fiat also,when the dollar crashes most likely the euro will replace it as the top fiat currency in the world.
It depends. At the moment, if the US dollar collapse, the Euro will replace it. In the future, it will be replaced by bitcoin.
nope, euro can't replace dollar as number one top currencies and if you've hope bitcoin will replace euroor dollar as currencies it's more impossible.