While I don't disagree with you (are you not describing every bubble in history?), eventually the music will stop and any 'investor' should at least be making reasonably sure there is a seat nearby. Tesla's jump on their earnings report was as I understand it, because they made a profit. I suppose you could make a case for that increasing the 'value' much more than 10%. (although I could also take it as a signal for the end of teslas growth phase, and mark it down.) Hopefully all the different opinions average out at 'the one true answer' (tm).