This is the clever American strategy. First they will sell their debt in dollar. Then they will devalue the dollar so much, that the debt is nearly worthless. The countries, which usually purchase the American debt (China, Japan, GCC nations.etc) are left powerless, as they see their net wealth in the form of US treasury bonds decline day after day.
You know the money policies of the usa are so strange that I honestly think this is what is happening. But the big problem for us is that everything is more expensive by a lot every year, but we are all (or most of us) not making more money every year to catch up.