[spiralx]

What crisis would be so large that the US would be unable to keep up with it's repayments? Especially when you consider that it can borrow more to repay current debt instruments i.e. issue more Treasury bills, notes and bonds.

Plus other countries always need to borrow dollars because it's what oil is sold in, which is one of the things that makes US Government debt considered the baseline or "risk-free" investment, with any other investment having increased risk, and accordingly increased reward.