Investors who has been accumulating Bitcoin since 2016 or below can still sell out little of Bitcoin holding if need be because they have been accumulating and holding bitcoin for a long time it's not wrong if they won't to see small of their Bitcoin while those who hasn't gone far with their Bitcoin accumulation shouldn't even think of selling or wait for the value to increase before they can sell no since such people are still in their early stage they should concentrate more buying even if the price of Bitcoin keep adding values until they have gotten enough Bitcoin portfolio or has been accumulating and holding for a period of 4-10 years and, the DCA strategy is there to help accumulate Bitcoin gradually regardless of bitcoin price and hodl.
For those set of people selling some portion is a choice if they've met their target but selling all is a big mistake and wrong idea cause it would be unwise to hodl for that long and sell everything now when there's still hope for better days of bitcoin in the future. However one who's not even lasted in their hodling journey for up to a circle or decade is the biggest lower and would definitely regret in future when the number goes higher, many who did that in the past all regretted and had their own stories and advice all over the media, bitcoin has shown potential of being an investment opportunity which offers generational wealth for those who remain patient and hodl for long-term not for those who come into it for quick wealth.