So long as the rest of the world keeps buying US debt they will keep trucking on. The US is too big to fail: nobody can afford that house of cards to implode.
Exactly! What is the alternative "safe haven? The only alternative to US debt are hard tangibles like food, water, and weaponry (shelter was once included in the list of hard tangibles but property rights are also a fiat).
We basically have no alternative to the system of fiat currency and debt.