Given your extreme naivety about the nature of the money supply, I highly recommend that you take an introductory course on macro-economics. And where is it wr

Given your extreme naivety about the nature of the money supply, I highly recommend that you take an introductory course on macro-economics. And where is it written that the "working class" aren't allowed to buy foreign currencies? Given that I'll be flying out of the US tomorrow on holiday I was hoping I'd be able to buy some foreign currencies at the airport...