re: Does anyone have a prediction on what happens when the US becomes insolvent?

Massive contraction with civil unrest is the most likely outcome.

If no one wants to buy US debt then the government either prints the money to keep things going, or everything starts getting cut.

There is only one guarantee - the govt will choose a course of action that protects itself and hoards more power for itself. That pretty much means more power for government and less freedom for the People.