Your list isn't a bad one, but it doesn't control the volatility of BTC's price, it only limits its effect on the BTC investor who follows such strategies, your post title gives the impression of a discussion on the possibility of controlling BTC's price volatility generally, of which we can maybe mention mass adoption and fewer weak hands.
Investors can use technical analysis, fundamental analysis, or algorithmic trading to make informed decisions on when to buy or sell Bitcoin.
No matter the strategy used, it is not possible to be sure of when is the perfect time to buy BTC. BTC price movement may be cyclical and its history may repeat itself, but it does not happen or repeat exactly in the same way, so guesses on BTC price movements is usually wrong or inaccurate.