There are many who are not patient. And cannot handle greed. For example, there are many people who sell some or all of their BTC after investing, as soon as they see some amount of profit in their portfolio. These cannot be called investors. Investment is long-term, such as keeping a time frame of 2 to 3 circles. Those who do all these things are called short-term investors or traders. Many new investors think that short-term investments make a lot of profit. In short-term investments or trading, the possibility of losing your money is very high. In long-term investments, you do not have to worry too much about small market declines. The amount of risk is much less in long-term investments compared to short-term investments. Always keep yourself away from short-term investments or trading. Then you do not have to worry too much and the risk of losing your money will be much less.
Everyone certainly has their own reasons for selling when they have seen profit, but of course this has changed the planning they have made before, but if only they could still hold on longer according to the plan when they bought, of course the profit they got would be greater than selling now.
I agree with you to avoid trading as a beginner because the risk of losing the money we have is very large, but when planning to hold it for the long term, of course we have to make good plans and continue investing until we reach the profit target we want.
No reason should justify selling at the sight of profits, it is a bad practice that we should try and discourage people from doing. Anyone who engages in this will end up missing the main gain that comes with investing and holding bitcoin. If you sell when you see profits, you may end up buying at higher prices hoping to sell again and profits. What this mean is that you will be losing money on the process if care is not taken. Take for instance, assuming you sold your bitcoin when it reached $33,000 after buying during the consolidation around $26,000, you would have made profit which is true but you would have missed buying bitcoin ever again at $26,000 and from that time onward, the price continued going higher and higher until it got to $100,000. Assuming you had 1 bitcoin then, that means if you want to buy again now, the total money you realized from selling would have only been able to afford you about 0.4BTC as of today. Do you now see that no reason should justify buying and selling at the sight of profits.