I don't think many people know how much 1 gram of gold is really worth. I think it's more misleading to use grams rather than real money.
People have the habit of comparing anything they exchange in terms of their own currency.
Gold in itself is pretty much useless without some kind of monetary value associated to it. You always have to convert to your original currency and take into account the daily fluctuations to really know what it's worth. Well, maybe I'm wrong, but that's how I see things. With Pot o' e-gold, there is not limit to the amount you can get. If you are a Free-Market.