I see no compelling reason to believe that the dollar is "inevitably" going to plummet in the next decade.
I'm sure Gorbachev said the exact same thing about the Ruble in the late 1980s.
PS- The USD has already plummeted from 2000-present, and this trend will only accelerate.
The US gov't is in so far over its head that the only way out is default. Paying back these astronomical debts is impossible. And if the US gov't defaults, it is game over. The Fed will lose its exalted status as issuer of the world's reserve currency, and will go back to being just another group of banks. That's if they are lucky. If they are unlucky, and weren't quick enough to grab their loot and skedaddle to the Bahamas, they will be hung from lamp posts. Or worse.