With Tesla ~$100/share, It'll have to go up 14% just to break even on the trade. Even if you just buy in single shares but exit in multiple shares to spread the commission, you still have to fade 7% commission. Not worth it.
If you're investing in the hundreds of dollars, you should look for low commission options such as CDs.
Edit: I accidentally replied to the post. My comment was meant in response to this comment. https://news.ycombinator.com/item?id=5904397