The part of the article that really resonated was the comparison to current car companies. Is Tesla really worth the same as Porsche? Porsche has an amazingly strong brand, is the most profitable car company in the world, has 5 models, and a 80+ year tradition of building cars. Tesla has 1 model, is barely profitable, and only a few years of building cars. Saying that these car companies should have the same market valuation does seem a little silly when you compare them that way.

That all said, a stock's price is driven tremendously by its potential for growth, not necessarily the underlying cash flow. While Porsche may have the stronger cash flow, obviously Tesla has the stronger potential for growth.

The bubble will pop if/when their growth metrics start to show signs of slowing. If/When they start missing sales targets, the stock will crash, quickly.