NEW YORK ( TheStreet) -- Were you ever standing in line getting coffee, and wondering to yourself: how do I make money on America's obsession with getting a caffeine fix?It's easier to come up with the idea than it is to execute on it. For instance, you can buy individual stocks, but that can be risky. Take a look at the one-year chart for Green Mountain Coffee Roasters for a glimpse of just how dangerous cashing in on caffeine can be. You can buy coffee indices, but these are bets on coffee the commodity, not coffee the consumer product. The two are not unrelated, but Dunkin Donuts stealing share from Starbucks, or vice versa, is not going to impact the underlying commodity price.