Agree, there's nothing wrong with high value speculation as long as you recognize it.

Tesla is overvalued. If you were to take a present snapshot in time (a data point) and compare the assets and cash value of Tesla with what its stock price is it would be wildly off.

Everyone always remembers the winners, the Googles, Microsofts, and Facebooks. No one remembers the hundreds of dot bomb companies (including Cisco) that saw tremendous loss in stock when everyone thought they were "certain" to succeed.