I don't understand what people don't understand. You can always hear how risky derivatives are. We saw that now. I prefer ETF-s, certificates, stocks, where you can never pay more of what you invested. (I'm long on oil stocks and short on oil.)

“If you had a stinking barrel of oil in your back yard, would you pay someone $100 a barrel to take it away?” (Paul Sankey in Oilprice.com)