I did the same thing about a year ago and I'm still happy that I did, despite the stock not moving over the past year. I do believe Tesla can become a major car manufacturer during the transition to electric cars, since this period will likely be fatal to some of the weaker legacy companies.

I also realized that I may have purchased a ticket to Mars. If Musk's plans for both Tesla and SpaceX pan out, my Telsa shares will hopefully be worth as much as a trip to Mars in 30-35 years :)