>The point is that Tesla doesn't move anywhere near enough volume or generate anywhere near enough sales to justify its market cap.
Buying TSLA right now is making a big bet on the Model 3. If Tesla comes out with a popular car (likely) and can make enough of them to turn a profit (little more skeptical on that one), it may end up justifying valuations. I wouldn't put my money on it, but I'm not surprised other people do.