Profit is a profit. You can't magically sell your coin at the top of the market. Just receive your profit, and take a lesson on your trade. And I don't think that profit isn't good profit, maybe you just biased by how high the coin goes instead focusing on your trade gain.
I also agree your opinion. This is an ordinary thing in trading and does not have to be sorry. Difficulty predicts makes us sell at a point being considered safe. But this is not bad. That will be a problem is when we buy when the price reaches its peak.