I think when all the coins are at their peak this is a good time to sell. maybe some people think, the price will go up again but it all passed and the price of the coin started to fall and regretted it. what if you are a true holder you will definitely buy it back at a cheap price and wait for it to come back up even though it takes a long time. This is just my opinion, and everyone is entitled to their opinion.
Selling everything and waiting for the lowest possible price to buy is always the right strategy. I was once in love with some cryptos and forever could not resist losing. The amount that I already have has decreased many times. Instead of suffering and wasting time in a downtrend, the best way is to wait for the lowest possible price to buy and wait for the bull market to heat up again.