As soon as you have a profit, do you convert or sell? Which is more worthwhile? For example, a coin in my portfolio exploded and went up a lot. Do I sell it quickly or convert it? Which is more worthwhile?

$HIVE Guys, what exactly happened that so many people were complaining about the fees for this currency?! In my case, in the last 2 or 3 days, I made a profit of over 30% and the fees when converting to dollars were super small and I still took advantage of the EARN above 45% in those days.
$USDC $AI What were those fees? What was it about? The profit? Could you give an example? Thanks!