Oh no, how could we ever live without money? Without gross symbols of excess, what would Americans have to look up to?

And Roarkiller's right, you're not going to be levitating by Casimir effect any time soon. According to wiki, force on a pair of conducting plates due to the Casimir effect is inversely proportional to distance ^ 4, so it gets really small really fast, not to mention that the force has a coefficient of ~ 10^-28, so its pretty damn weak too. Might be useful someday, but for now it's just a cool mathematical concept ^_^