Precisely predicting the bottom isn't that important; what truly determines how much you earn is whether the stock you buy at the bottom can be held until the top.
I bought BTC in the last round at 16-18k, and sold it all around 23k. At the time, I thought, "That's satisfying," and I'll buy it back after a short-term pullback.
The result was that I just watched it rise and waited and waited. 😂