It's a wrong mindset in my own opinion, selling some part of your Bitcoin as a means of managing risk makes no sense especially if you are no where near the end of your accumulation journey or you haven't gotten up to that over accumulation status yet.
If your intention is to hold bitcoin for a long term, then why sell when their is just a little price movement in the market. Which risk are you managing? because if you are planning to hold bitcoin for long term, then bitcoin wont move just a little bit, and you will want to sell just to manage your risk, if you are having that kind of mindset, then you won’t be able to hold for long term because any slight increase in price, you will sell, hoping to buy back when the price drops, and you should know that the price won’t always be dropping to the price which you want.
If you want to invest in bitcoin for long term, then you shouldn’t have the mindset of selling when you are in little profit, if you can do it that you won’t really be checking your wallet frequently, or you won’t be checking the market frequently, am sure that’s really going to help.
If you have checked bitcoin price history, then you going to know that bitcoin price is still going to go higher, and you shouldn’t be distracted with the little price movement in the market currently, you shouldn’t be scared that bitcoin is going to dump, all what you should do is just to make sure you properly secure your bitcoin, and you have nothing to panic about.