That's probably what we'll end up going to and frankly that's scary as fuck. You are talking about a one world currency which implies all sovereigns implicitly forfeit their sovereignty to an unregulated non-governmental organization.Would it be possible to go to a completely digitalized fiat currency? Maybe based on Special Drawing Rights or something else that would be completely global as apposed to national.
Say hypothetically...... a huge melt down of the dollar and corresponding melt down of the Euro or vise versa..... could a completely digitalized currency take the place of national currencies? Sort of like when we went off the gold standard and paper became the value exchanged.
If it is a stupid question or not stated properly, just say so.
Peace
But crisis precipitates change. And as Machiavelli said. "Never let a crisis go to waste."
To me this sounds like a progressive wet dream (ie One world, one currency, one government). I think the end result would be social unrest and war.