@lain @klaatu fits the definition. It only has value because someone said it has value and someone else believed it. That's what fiat is, you know. Now, if you had a pizza chain and you were to actually guarantee in some meaningful way that you'll ALWAYS sell 100 pizzas of specified quality and size, that you'll never run out and all for 1 Bitcoin, or whatever rate you'd choose, you could argue it's no fiat, but until then.... Ya know.