That’s less significant than you might think as US GDP is almost 1/4 of global GDP and foreign countries don’t keep that many USD on hand. Aka even in global terms US GDP is vast.
Also, Bitcoin has significantly more vulnerabilities than just a 51% attack or a crash as nodes need to be connected to the internet and therefore can at least in theory be hacked. What exactly happens after that point is anyones guess, but it could easily be worse than a traditional 51% attack.
Also, Bitcoin has significantly more vulnerabilities than just a 51% attack or a crash as nodes need to be connected to the internet and therefore can at least in theory be hacked. What exactly happens after that point is anyones guess, but it could easily be worse than a traditional 51% attack.