Many other nations have already bailed on the U.S. dollar because they see it as a disaster in the near future.
In 1971 the dollar was removed “temporarily” from being backed by gold. But it never returned as Nixon himself believed it would. Since then the dollar was essentially an un backed fiat currency.
Meanwhile other nations are dumping the dollar and buying up gold reserves.
The problem there is that anyone bailing on the U.S. dollar is still going to have to replace it with something else. And the U.S. dollar is pretty strong today relative to most other stable currencies.