This belief is flat out wrong and is completely oblivious to the current geopolitical landscape. US is likely to get sanctioned by its prior allies in the near future and you need to wake up.
I think losing the European market will do a lot of harm to the US, especially their precious tech giants, plus they'll lose creditors. The $$$ won't be what it used to be, and once that falls...
But the whole point of Musk and Thiel is for the USA to lose its power. You can't coerce large institutions, but you can do that with small ones, so they want decentralization, small zones. There they can buy power, and do whatever they please. For this, the federal USA has to be upended.