I think the preferred process is a soft landing... 120 day hard transition period come to mind.
But paper will burn.
The model I have heard is Republic's sovereign Gold backed currency within the Counties and World Trade will revolve around Crypto currency.
You need a Crypto World Exchange for that.
The Plan I was exposed to in 1992 by a person in a knowledgeable position was. The US would be the Bank. Considering Bank will or are suppose to become Wealth management center's.
The that would seem to place The United States as The World Crypto Exchange Holder. So it would have to valuate non gold back crypto if it still exists. I don't it survives unless it had hard assets.