what your talking about is making an investment instead of a trade. I think you should buy it on a dip and then go with your strategy of holding it long term. Buy 100 shares if you can. I like buying in 100 lots so you make a 100 bucks for every dollar the stock moves ( or lose a 100). I think Tesla has a 75% chance of being the Apple of Motors. Were gonna run out of gas eventually. Also you should really consider shares of Facebook (think Google when you think about FB as a stock). Maybe you should go half in on Facebook and the other half on Tesla.