Money, currency, capital, credit. It has many names but only one use: our tool for exchange. And as important as money is, it's unfortunately not well understood by most people, to their peril. As representative of the actual value of things in the world, money has no value in itself-the value of money is "borrowed" from the potential things that can be purchased with it. And because there is so much in the world, and so many different people, you would think that money would be as diverse and adjustable as the agreements we make with one another every day. But it's not. Government currencies...