Someone might. And that's why the thread exists. Someone might think that they are buying a chance of selling for more "real" (valuable) money later, as happened with feathercoin when it took off like a rocket. There's no intrinsic value to these coins as there is nowhere (that I'm aware of) that provides the opportunity to buy goods with them. These people are selling hope and that's all. The early-adopter boom phase is being pushed and pushed, and if enough people are seen to be selling (new)coin for an amount of (old)coin, then a value is created, pushed by speculation, and will shoot up and then die a quick death.

Now that I'm done explaining things to people who know them already, back to my day. Which was made happier by making 1.5 BTC from a day's worth of mining feathercoin a week ago.