Not to mention using up your stash for some publicity stunt. A lot of people will look back witha lot of regret if this does get as big as people think it will.
Unless you repurchase the same amount of BTC that you spend. Which further departs this from the idea of "using only Bitcoin"...Bitcoin could be great as currency between two parties who use Bitcoin. When one (or both) of the parties is only interested in holding the fiat equivalent, though, it's hard to classify the transaction along the lines of "using only Bitcoin". Then it's just another way to transfer the fiat, which may or may not be worse than traditional transfer schemes (credit, debit, cash, etc.), depending on the buy/sell gaps and fees you're dealing with when converting BTC to/from fiat.
