Is there anyone who won't sell during the next bull cycle?

Most people expect there to be the next bull run in the 2024/25 cycle. I personally expect this as well. However, so many people have been scarred (both emotionally and in terms of their portfolio) in both the 2017/18 bull/bear market and 2021/22 bull/bear market. Which leads me to this question. Is there anyone that won't take profits or even sell everything once a bull run hits in 2024/25? Now, you might counter and say that you don't trust yourself to time the market. But it doesn't take a genius to know that 2017 December/2018 January and 2021 January-May was insane bull market. Moreover, people are now figuring out that you don't even have to sell the top to profit. If you sold BTC at ANY point in 2021, it would have been a good decision.

So if you are not selling or even taking a huge chunk of profit in the next bull run, what would be the reason for not doing so?