The chart pattern which was forming was double top with bearish RSI Divergence in which RSI is was going down, Price was going up.
Once it came towards $48k, I was able to see it forming another similar pattern which happened in 2018 that it will touch $22k.
So I bought at $21.5k for 50%, and DCAing the rest 50% throughout the year.
I am like when I really need cash then I take a good portion and sell. Many times I found myself, after selling some the market started to move up and up like 10x LOL
By the way, I am DCAing from long time. It was slow when the price was over $30k but now pushing it again.