* You take money from investors
* You then claim that you are making money from some legitimate business
* You return money to earlier investors by just feeding them the money later investors put in
So who are the early investors here, what's the legitimate business, and how are we taking money from later investors to give to early investors?
EDIT: Guys, it's not a zero-sum game. You can breed new axies, etc. By the logic espoused by everyone in the responses, the stock market is a ponzi scheme because later participants buy stock from earlier participants. This may be my fault with the defn lacking some things, but clearly the stock market isn't a ponzi scheme, so something is wrong.