Investors in Tesla (TSLA 1.14%) were disappointed to see the stock sell-off about 9% today, on news that the company missed earnings per share, with a larger loss than expected. In the following video, Motley Fool industrials analyst Blake Bos warns Tesla investors that sticking with this stock means being comfortable with a lot of volatility, and banking on a very long-term investing thesis. Tesla is a potentially game-changing stock. But it currently has a high valuation, and has yet to prove that  its technology is going to be the disruptor that investors are hoping for. Blake also gives his personal thoughts on Tesla, and gives one suggestion for a safer play, for those who are a little more risk-averse.