Bad loans discussed vigorously by Michelle.
Who is to blame if you take out a fraudulent loan, or a loan you doubt you can pay off? Sovereign funds from the Middle East might help rescue Citibank's liquidity, but they will extract a heavy price for that investment. If you gamble, you're on your own. When you win, you win. When you lose, don't come crying to me.
And please don't claim that you are a victim because you didn't read the terms of the loan. Basic literacy is assumed in financial transactions, as is the assumption of risk. As we can see, your lender also assumes his share of risk.
But don't listen to me. I think the stock market is a gambling enterprise unless you have a 20-year time horizon. Blue Chip US stocks have not moved an inch in 8 years - other than downwards recently.