It would be best to take the big profits that can be made at that time if you are a trader, and let some of it help you wait for the next bull run. You can use your profits to buy some if there is a bearish.
It is indeed highly recommended to take profits or sell partially when the price has reached the new ATH of 100k and this is my target as well.
(....)
This is also my goal because just in case we will reach this price, I accumulated quite enough Bitcoin from cheap prices, but I will not sell most of my Bitcoin, only partial.
Another thing is this "take profits" act will depends also to other people like depends on the price of how much they bought their Bitcoin.