I won't lie, I saw this drop incoming, I sold near $50k's and bought back at $32k, then sold at $64k in Nov.
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 caught the bearish trend a bit late. I sold at $32k bought back at 25k and never bought again. My indication is still pointing towards the bear market so i will rather wait to buy the dip. But if my analysis goes wrong i will buy above $25k to avoid been trapped. I will start applying DCA if price falls to $15k but if $15k margin never occurs then $25k again will be my new bull