Yes exactly. As long as there is a mutual agreement between everyone, it is not impossible to even create new currency to be used or change the financial system in which it won't be dependent on USD. In regards to changinf currencies, we are all aware that there have been mamy issues involved with USD even from before, and there are so many countries who are already waiting to be next reserved currency.

The currency alone is easy, but the agreement is the one that seems possible. We know that before it reaches some sort of agreement, there're various procedures to follow and it is also possible that there will be debates and arguments to follow.