> No reason it can't be some crypto that is not backed by any nation
There is a great reason: a state-backed currency should always be accepted by that state. If the world is in crisis, you may wind up stuck with your Bitcoins.
Is it a conspiracy theory that Bitcoin was developed by the US military as a hedge against US dollar hyperinflation? I've heard that argument made somewhere but maybe it was just a rumor to try to legitimize Bitcoin?
I thought we were talking about World reserve currency here i.e. international trade.
I agree that you need the currency to be accepted by the state for good local trade support. But that was not the point.