I want to assume that there are few people, who make several profits from trading altcoins, but sell their profit to bitcoin, and then over time while holding bitcoin, it dumps and their profits dips alongside bitcoin.

Why not do it this way ?
Since you trade mostly in altcoins, as soon as your make your profits, sell them to stable coins or fiats, close that trade chapter.

If you are passionate about hodling bitcoin, you can wait for bitcoin dip at usdt or other stable coins.

What do you think everyone ? is there a better pattern that can be practiced?

I am open to more suggestions.