There’s no way an hodler will continue to hold forever even when they know they’re in profit. A time will come that they’ll be willing to sell some part of the investment even if not all of them. The reason for investment it to earn profit, it will be meaningless to just invest and not take profit after you’ve actually gotten enough to take some profits and still continue with the investment. Bitcoin has already shown to many that it’s an asset that will continue to have value, so they don’t get themselves stuck to panic and fear of losing their investment in the future.
There are people that will be ready to actually hold till the end and they will just focus on selling the profits gradually, everyone have their draft plan on what they want to do with holdings. Except for anyone that is inheriting they might want to sell everything, and plenty that inherit bitcoin they might not know the pain of holding bitcoin, their times that you might need money and actually want to sell some and it is not a bad idea at all, and that is one of the reasons a lot of will sell because they will want to use money so they might be encouraged to want to sell part, you can even even take profit and when the price is down you can just buy more and keep taking profits and buy at a low price, it's all business either you buy or you sell, it's an asset so you can sell any time you want.