Relatedly, when I was looking at short interest I saw an article about how $TSLA was (at the time) trailing gains in the indexes. Looking at it that way would be your #4 -- buy all at once and no new investments. But what if you bought into it gradually -- not cherry picking your entry points, but at regular, consistent intervals. So I took the short interest data (which included closing price for mid-month and end of month) and assumed the same amount of
money spent on shares at each point. Due to the volatility in the last year that simple mid/end stock buying plan had a better return rate than the indexes.
Furthermore, using the time interval of the data I had, holding at the beginning was about 9%
loss instead of profit.
Which is to say, you missed #5, invest the money divided evenly over time. If a stock is volatile you will pick up lows as well as highs which should get you closer to "average" returns. I'm not saying its a good strategy, but I found it interesting that it performed better than buy-at-beginning for the arbitrary time interval I happened to use. Naturally it would perform worse if you picked your start date at $180
Just a thought