FOMO is not good, controlling himself and being calm can avoid the FOMO. Although not completely avoidable, at least your mind is more calm and able to make the right decisions at such times. And do not blame the internet connection and whatever when you experience a loss when trading, think that you are just unlucky at the time and you are able to return it back. Blaming something for losses only makes us continue to regret it, please avoid this attitude.
You got it wrong, I think the topic should be "FOMO is bad at all times because to be honest, I have never seen a situation where FOMO is good, FOMO is all about greed and this does not give you the time to do a thorough research about a project before you purchase and most times, you end up purchasing when it is very expensive.
That is the behavior of FOMO who will not research the project and will only buy when the price is high, if the behavior is done then it will forever be a FOMO and forever will lose. So, don't get used to it and always do research first to buy, because buying when high prices will be very risky and basically we have to be patient to buy and sell because there will be a right time to do it.
Well it's a little difficult when in a situation like that, where someone has been patient waiting a long time and because of something they lose the moment. At that time FOMO will haunt our minds, I think there must be emotional education about trade. I saw several youtube channels that gave tips on trading, they were able to maintain the situation when they lost their moments and were patient again so they were very confident, this is a professional trader.