When time tells me to sell! Its complex, will depend on that situation. But btc always dump after pump. So it Won't be a bad idea to sell high and buy low. Next next bull run is unpredictable, time is unpredictable, many thing could be happened. I can't risk long hold 2 bull run with all my assets.
As long as the sale can provide a decent profit for you, I don't think there is anything wrong with doing it when Bitcoin prices are high. But I don't want to say that Bitcoin was dumped after being pumped, because words like that are only more suitable for altcoins, not for Bitcoin even though the price decline after being pumped also looks not much different from the others. The next bullrun cannot be predicted if it is aimed at prices, but each person can make their own decision in surviving or taking risks on Bitcoin or others because each person's ability to do so is also very different.