its all about the benjamins ... hopefully your dollar doesnt devalue. I have read that China holds enough US currency that if they released it onto the world market the green back would tank so fast the US wouldnt know what hit em. Apperently they use that as leverage, and why not.
Screw the cold war, this is the bling war. But dont worry, super power or not, you guys have way more spinner rims and gold chains per capita than any other country.