Banks get to do that because they tend to be insured by the FDIC and need to follow about a ten mile high stack of government regulations to even open their doors, much less continue to operate. You can't just take people's money and say you're a bank, or do the same things a bank would do. If everyone wants to withdraw their money from the bank on the same day, the government covers it when the bank doesn't have the actual money (with certain limits). I don't have a lot of background knowledge (besides the article) about Full Tilt, but who insured people's money in it? Anyone? Or was there a written understanding that if you wanted the money in your account, you might never get it? Certainly didn't sound like that from the article. I'd say on a spectrum with Ponzi on one side, and bank on the other - it's about 99.9% on the Ponzi side.