Actually the end of bull run is something we dont know, so it is depending on your intuition and perception. Also it is better to always set up your target price and do not be greedy. We have to make a brave decision to cut something as long as we have already achieve our goals and profits.
Bullrun and Bearish conditions are like guessing the future, both of which are equally difficult for everyone to know, so there are still many people who make mistakes when making decisions in every condition because it happens based on good and bad news, so it is not all wishes can be fulfilled very well.