What stands between the USD and the Zimbabwean Dollar is the worlds largest military/intelligence power not just prepared but using it's full strength to enforce the petrodollar.
I don't mind the downvotes, but I would rather see rebuttals that would change my mind.
The Fed is doing something similar with quantitative easing, but at a by far smaller scale, and the money mostly goes to banks anyway. It's injecting printed money into the real economy that spells trouble, and that is currently not happening in the US.
Also, while the military is definitely a boon to the US economy, most of that is indirect via guaranteed jobs and income, not via projected force.
Plus, in case of a hyperinflation, the military would become unmaintainable very quickly, exactly because of it's size.
All that said, your comment had basically nothing to do with the topic (debt), so there is where the downvotes come from.