I only would consider selling to buy back Bitcoin to be valid, when such investor musy have been present in the market for at least a full cycle to see how far his investment has gone, of which such investor must have a good stash of Bitcoin and has reach a certain maturity stage whereby he isn't joking around his portfolio but not a beginner or one who accumulation journey and portfolio is still below average ( best word I can use) that's same thing as chasing short term gains because you are just crashing your accumulation journey.
Selling to buy back is reinvestment in Bitcoin which isn't the right phase for anyone who don't have a good stash of Bitcoin or still in early phase of accumulation, you will surely get wrecked if you do.
Selling to buy back is a normal thing, but the small percentage of assets we own will only provide small profits. I am more interested in buying and holding while the accumulation of purchases can still be done according to the DCA method that most people use. The condition of selling to buy also does not guarantee whether we can repeat the same luck because prices fluctuate. If we understand that bitcoin is a long-term investment then the investment concept must also be thought about accumulation and it is best to use several methods to buy and not trade in the short term when the assets we own are very small.
You are very correct especially in the aspect of connecting luck to selling to buy back. It is truly a thing of luck because there are so many things that can make an investor not to be able to effectively sell and replenish his bitcoin collection. One of them is being unable to know the right entry point because people who engage in such practice usually want to buy at the perfect bottom and sell at the perfect peak. As we know, it is very difficult knowing what the bottom and peak will be, so the investor can miss getting an entry just because of this confusion. Hence, the reason I agree that it will involve some form of luck to be able to effectively do this.
This is just my personal thought because from what I've seen investors who expect to sell to buy usually don't have that strong of a hold on bitcoin. Apart from being new to investing, there are also doubts when Bitcoin experiences a severe correction. If you look at it today, perhaps Bitcoin has experienced a significant increase, but if you look at it 3 or 4 years ago, you will definitely think differently.
To me those are not real holders rather the are traders who buy and sell with target of profit and not owning bitcoin. There are investors who are motivated by the need to own bitcoin not just for some fast profits. These are the people to hold bitcoin more even during retracement or bear market, they treasure bitcoin and wouldn't want to let go of it because the know how valuable it is.
My motivation to start buying and holding bitcoin is because I have seen how beautiful bitcoin is and the freedom it offers to those who take possession of it. The potential is just amazing and I have decided to give it all it takes to be able to stash as many of it as I can because it only gets better with time. So the longer I have it, the better it gets so the best way to secure the future is to have enough bitcoin in my portfolio.