Using this your formula, you would only be leaving your profits after the bull run to remain in your portfolio and taking out your capital every fucking cycle? This shows you don't fully understand the attitude of a real investor and you're trying out some smart ass practices on your portfolio. You'll end up with very little quantity of Bitcoin in the end since you're not really accumulating it, but gambling with it.
As a dedicated Bitcoin investor, you don't tamper with your portfolio until the expiration of your holding period, else you risk ending up with fewer coins because you must've sold much BTC too soon and you'll surely regret your actions when the price of Bitcoin has gone really high and you're not having enough coins to get good profits.
The goal is to continue accumulating Bitcoin to have a good quantity of it before the expiration of your holding period, and since you're going for a long term, by then the compounding effect of Bitcoin price increase would have be felt in your holdings and your investment would be very profitable.
Whether someone will sell their BTC during a bull market depends on the investor’s goals and investment strategy. There are basically two goals of investing.
1. Investing with the hope of higher profits, that is, traders.
2. Another long-term investor.
Traders often make the mistake of making prudent decisions in the hope of higher profits. They make sudden decisions influenced by 'FOMO'. But it is important to remember that today I am selling BTC after seeing a double profit, and I also have a part of the profit. But if people have cash in their hands, for whatever reason it runs out. When it increases several times in five years, there will be no end of regrets. Because the money has already been spent.
On the other hand, those who think about holding it for the long term are very prudent because they try to become financially independent. Real investors attach more importance to fundamental analysis, do not believe in any kind of emotions or rumors in the market. They invest with a long-term perspective, because it takes time to acquire real wealth.