It's about adding liquidity. You think bitcoin would be worth fuck all without trading? I'm done arguing with an idiot, moving on now.
Well, there'd be a discount, as buying and selling OTC carries a natural penalty. I'm not sure it would be worth "fuck all" however. There are plenty of illiquid assets that possess speculative value.
i'm with chesthing, "fuck all" is an exaggeration but obviously the biggest game in bitcoin town has been is likely to continue being for some time the buying and selling of bitcoins.