This is not different from trading any other securities for example Walmart stock. Outcomes are always some what depending on random events, but it doesn't mean that we don't trade Walmart.
Quote from Martinghoul:
I disagree... Suppose I give you a futures contract where the underlying for delivery is either: nothing, 1000 barrels of oil, 91 metric tons of rice or 100 troy ounces of gold. Which one of those the contract settles to is chosen at random. Let's say it's priced at arnd 466. Would you buy it or sell it? [/B]
hahaha ...Good example Martin.