If selling BTC in the past is considered a mistake, then you will be haunted by regret when you actually exit BTC and sell all your BTC whether it is in a bullish or bearish period.... selling BTC does not need to be regretted, we can buy again and not repeat the previous mistakes that occurred... try to hold for the next 5 years... if you get a profit, I'm sure you will also regret it because you feel that the profit obtained is not optimal, it could be because there was a higher peak before...
That's how humans are, having a greedy nature and still regretting every missed opportunity... but this natural nature has also happened to me, and I consider it normal for anyone to happen..
How much money have I lost in crypto??? Well... the amount is not greater than what I got, but the loss really taught me to gain experience in this crypto world.. we can consider it a sacrifice.