You'll find that most of the .com domains you can think of (well, shorter ones, anyhow, of one or two words, even misspelled) are already taken but not used. Some people have made their fortune by buying up domains and not using them—instead selling them at a profit to those who later want them. I think it's unethical, but of course it's legal, so it's up to you. A few domains bought this way is perfectly fine, of course. I don't register names unless there's some chance I'll use them. In this world of opportunism, though, I'm basically a fool.