Selling your bitcoin too early isn't a good way to preserve the compounding value of your bitcoin portfolio even though you have reached your bitcoin target.
Investors are not expected to sell that early, except when after they buy in the dip, the market quickly rise and they were able to marginalize a reasonable amount as profit over thier short time investment, then they can sell to reinvest and continue to hold, but in most cases, i do see investors as long time holders as you have said, because they are willing to have thier asset preserved over time without losing out, and they make more profits as the market rises and they can comfortably sell at bullrun when it is pumping fast.
You have successfully promoted trading with this your comment. Anyone who buys at dip with intention to sell at any market upward shift and then sells, is a trader and not an investor. Most traders don't last in bitcoin journey as you may either have to choose between buying back at a higher price or backing out of bitcoin accumulation completely. That bitcoin is volatile doesn't mean that it must always fluctuate to favour your interests.
You contradict your points here and you are obviously proclaiming that invstors who bought the dip can start gambling with bitcoin in the pattern of selling and reinvesting. Of course I can never agree with that strategy. Investors should be very intentional about their accumulating bitcoin and not engage in trading activities like selling to reinvest because it creates a shift in the mindset of an investor to start thinking he can have an accuracy of timing the market and buying back cheaper.
What if after selling to reinvest and bitcoin price never comes down for him to buy back cheaper? the investor finally buys back and ends up with fewer coins because he has chosen to be trading bitcoin at a time he should be investing into it. Additionally, as the prices begins to go up and never come down, the investor turned trader may keep waiting for the price to come down and maybe never buy back if the price keeps going up and this might stagnant his accumulation journey and at worse case scenario might even weaken his motivation and he ends up jeopardizing his accumulation journey
As a bitcoin investor, one quality you must first acquire is how to fight back at every urge to trade bitcoin and how to hold back even when you feel the price is getting juicy. Sometimes selling to buy back successfully is what drags many investors into losses that led them into quitting bitcoin investment completely. The goal is to hold for long not to monitor the bitcoin chart. Have you spent a given period of time without much concerns about bitcoin market behaviour?? This is one of the ways to train your mind and condition it for a long-term order than trading bitcoin which could be a financial mistake at some point.