Trading Places is a 1983 film about 2 men who trade places. Basically, the two owners of this investing company make a bet, one of them says "I bet that if we pulled some random bum off the street, he would do just as well as our top investor." and the other one says "I bet you a dollar that you're wrong." So, they fire their top investor, and frame him for (i can't remember). At the same time, they bail a homeless black man out of jail and put him in the investors place. Then the investor learns what it's like to live on the streets, and the homeless guy learns what it's like to be rich.