Very little, according to Felix Salmon:
His larger argument:
Why is the price of gold going up? Simple: when interest rates are this low, bonds are increasingly unattractive as a source of yield, so you might as well just buy stuff — call it SWAG — instead. SWAG doesn’t have any yield, but then again, neither does cash, really. And when there aren’t attractive investments out there, then it becomes more attractive to spend money rather than to invest it. As a result, people spend their money on SWAG, and some of them even kid themselves while doing so that by buying their SWAG they’re making some kind of investment. They’re not. And they’re certainly not producing a reliable guide to the future status of the US dollar.
The Dish 