I think the danger is in the big automakers getting EV right, before Tesla reaches the middle and low end of the market. Nissan has the Leaf, which is by most accounts, a great little car. The Chevy Volt is the best-selling in my neck of the woods, it seems. Tesla makes better electric cars...as far as the reviews indicate. But, they're also much more expensive.
But, here's the reason I just placed a limit order for tomorrow morning (I'd check into TSLA a couple of times this year and thought, "Nope, still trading too high."): Tesla is currently selling as many cars in a year as Chevy sells in three days. So, the stories I can envision in my head for how this will play out are one of the two:
1. Tesla will fail to scale up. They will not be able to continue executing on their business plan effective. Growth will halt. The big auto makers will gradually move into the EV market. They will use their leverage as larger players with more money to throw around to beat Tesla on the battery front and on manufacturing costs. Tesla will remain a bit player, and be bought up for patents in a few years. The stock will not do well, long term, in this scenario.
2. Tesla will continue to execute well, if not flawlessly as they have done up to now (let's be honest, Tesla has an amazing record of doing the right thing at the right time). They will continue to grow at a very rapid clip. They will enter new markets. They will sell more cars than they can manufacture (and maybe more electric cars than anyone else can manufacture also, due to the current limited battery availability). They will continue to execute well on battery acquisition and development. They will continue to execute well on solving the cross-country EV trip problem...before any other manufacturer. And, they will become a major automaker. The market is huge. They're less than 100th the size of Chevrolet or Ford. That's a lot of room for growth, even with their share price being hundreds of times earnings (yes, it really is a very expensive stock, in that regard).
So, my primary question is: Will they execute really well. History says they will.
And, my next question is: Will I get other chances to buy at a discount over what it's trading at now? I don't know. I've regretted not buying stocks in the past due to it looking really expensive. I put off buying GOOG for a long time. Watched it from IPO on up to $750+. Then it went on sale for $340, and I backed up the truck as well as my stock portfolio would allow (so, I'm currently approaching a triple bagger on GOOG). TSLA is no GOOG. Probably never will be. But, it's potentially a much larger company than it is today. I'm willing to bet a few bucks that it will be. But, it is definitely gambling and not value investing.