But when you use debt to potentially multiply your profits, you also create the possibility that your losses will be multiplied if the markets turn against you. When the next stock market crash happens, and the gigantic pyramid of risk, debt and leverage on Wall Street comes tumbling down, will highly leveraged banks such as Goldman Sachs ask the federal government to bail them out? The use of leverage is one of the greatest threats to our financial system, and yet most Americans do not even really understand what it is. The following is a basic definition of leverage from Investopedia: "The use of various financial instruments or borrowed capital, such as margin, to increase the potential return of an investment." Leverage allows firms to make much larger bets in the financial markets than they otherwise would be able to, and at this point Goldman Sachs and the big hedge funds are pushing leverage to ridiculous extremes. When the financial markets go up and they win on those bets, they can win very big. For example, revenues at Goldman Sachs increased by about 30 percent in 2012 and Goldman stock has soared by more than 40 percent over the past 12 months. Those are eye-popping numbers. But leverage is a double-edged sword. When the markets turn, Goldman Sachs and many of these large hedge funds could be facing astronomical losses.