You nailed it. And that's exactly the reason why a lot of traders do not succeed in trading, simply because majority of them are still trading with emotions, are still trading using their maximum amount of greed.
Trading is heavily linked to gambling. We know gambling. The act is also heavily linked to greed and as to why many are termed as ''problem gamblers''. Greed should also stem with emotions. Trading and gambling are so fast-paced. Results are up and down. They are like a roller coaster of emotions.
And until they will never experience the losses and consequences of being a greedy trader, they will never make positive changes that could somehow contribute to their trading success.
As they say:
experience is the best teacher, but it is still or also possible for one to start with lesser risk. That is if they won't be greedy and rush things without proper knowledge on their head.
However, greed is something that's human nature. Everyone has certainly greed deep within, but some are good enough to control them especially if they know how risky trading is, and being more greedy will only compromise their trading outcome.
Yes. Even not in trading but there should be other things that now makes them to be greedy. It is not an excuse though but we still need to try to control it, especially if the thing is not right to be greedy with. That being said, yes that there are things that being greedy can be a good thing.