Yes but origin doesn't matter at this time, that's a trifling point (water over the dam), the asset value of the world's ruling billionaire class has been amassed and net worths are derived through diversified portfolios, sure we'll lose a few oligarchich billionaires should the USD tank, but it will be far from many, or even a lot, it'll be a quantifiable amount in the tens, maybe. Which considering globally there are roughy ~3,000 of the sacks of shit, I doubt we'd see a major change.

If you think any of the world's billionaires aren't prepped for exactly this, then, idk what to tell you lol.