Well a lot of other people are saying "It's crazy that a company with that few people and that little profit can be worth that many billions." Hence Twitter's problem at the moment.
Oh I agree, I didn't say I thought the company was going bust... just saying that this is likely the start of a lot more focus on the hard numbers of tech companies and less focus on hype-based valuation (although the later isn't going to disappear entirely). Just that question a a lot of startups hate "So how are you going to make money?" is likely going to start getting asked a lot more.
A sad day for Twitter, but a dose of reality for a lot of the fluffiness in the market at the moment.
Companies need to have real revenue and produce real profit and then need a valuation based on sane multiples. Twitter got behind that curve badly and ultimately this is what happens.