I hope this represents only a small percentage of your overall portfolio. For the great majority of people including myself, I believe it is safer to stick with highly rated mutual funds and generally avoid individual stocks, especially small company stocks which tend to be volatile. Most of us do not have the time to understand the market and individual companies well enough to beat a quality mutual fund. Further, many would argue that it's best to stick with index funds and not even try to outsmart the market.
Holding a modest amount of Tesla or Nissan stock as a vote of confidence in EVs might not be a bad thing, though.