I still haven't sell any of my coins, but I think I will start to sell some when the price cross $100K. I realized it's way more profitable to sell at the peak and then accumulate during bear season instead of 100% hold.
Exactly holding it for so long would generate higher returns but then you have to think two sided and looking at the all time high stateof Bitcoin and having invested so much already, I think it's best to share them. Possibly by 50/50 sell some and still hold some for the long run or upcoming bull run. Looking at the rise of Bitcoin this few season I think it's not best to hold at 100%.