Money is nothing but a store of energy. Instead of working now for that slice of pizza, I can work now for money, and then trade it with whomever, whenever, for whatever I want. This is precisely why I don't like fiat; there's nowhere to go but down, and in a set amount of years, the work I did in the past will have been for nothing; stolen energy, a waste of time, and I value my time pretty fucking well, since it's limited in supply and I have no idea how much of it I will ever have.
Very well put.