@DontTreadOnMe,
Naw, there's nothing backing the US currency. People invest in gold when they think inflation will make the US buck worthless.
The fact of the matter is, many foreign countries use the US currency as their own, and many who do have their own currency also accept US currency. Many countries also base their exchange rate on the US dollar.
There's trillions of US currency floating around this world that's worth much more than our GDP, but it still seems to hold enough value for foreign countries to purchase US treasuries.
They "funny" dynamics of this devaluation now going on with the US currency is that our products and services become more competitive in the world marketplace, and our debt decreases without having to pay for it.
We know there isn't much money circulating in this country, because consumer debt is dropping as well as consumer buying. Retail sales continues its downtrend while more people are again buying homes at bargain prices.