People exchange currencies for fun and profit. That part you probably knew. These currency exchanges total a whopping $5.3 trillion a day. A day! That's more than a trillion over what the U.S. government plans to spend this year!
Now the scary part. This massive trade, the largest one in the world, appears to be rigged. That means the banks are getting rich, and more money is siphoned invisibly out of the world economy.
When people use the term "banksters," this is what they're talking about. We need an actual crackdown (not just a slap on the wrist) to stop this.