The mistakes that investors in commodities commonly make?

Jim Rogers : They make the same mistakes investing in anything. They use too much leverage. The great advantage of commodity investing is you can use enormous leverage. The great disaster of commodity investing is you can use enormous leverage. Everybody in the world has a story about a brother-in-law who went broke investing in soybeans. But you don’t have to invest that way. When I set up the original fund, the point was to use no leverage so that the index and the fund would give a reflection of the cost of doing business. But the main mistakes are just what people make in everything. A lot of people invested in dot-coms, but they had no clue what a dot-com was. People bought dot-coms on enormous leverage having no clue what they were doing, not understanding the risk of leverage and knowing little about dot-com businesses. - in Hard Assets Investor http://www.hardassetsinvestor.com