To be fair the US is too big to fail. As Europe was forced to "do whatever it takes" to save the euro and bail out Greece the entire world can't stand by and watch America sink.
This is what happens when you let delusional bankers run things.
Monetary policy fails in low interest rate environments, and you get chaotic whipsaws thereafter which grow with time. You can find reference to this if you know where to look as far back as the 1930s.
Greedy corrupt blind individuals who have managed to infect leadership win so much that they lose everything.
We are getting a front-row seat to the specifics described in the socialist calculation problem, and it won't stop with just the US. This type of fire keeps burning until the fuel is out.
The rest of the world will probably not let the usd be the reserve currency, if the US does not show that it is able to manage that.