Is it a good idea to invest in Ethereum this way?

I've noticed that, in recent years, Ethereum has fluctuated a lot, but has consistently remained within the same price range. With the help of AI, I discovered that if I had bought Ethereum between 2022 and 2025 whenever the price fell below $2200, and sold whenever it rose above $3550, My average annual return would be 36.33% per annum. In comparison, if I bought on 1/1/2022 and sold on 12/31/2025, I would have an annual return of -5.26% per year.

Note: I know that past performance is no guarantee of future returns.