That's the right thing to do, do not be greedy when you have the opportunity to sell with a profit.
Being greedy will not gonna give us good result in the future, that is because the market is very unpredictable, it does not guarantee success.
Can't blame us, there were times when my greediness kicks in, I just couldn't control it. My emotion of being happy gives me a positive outcome and be exaggerated optimistic when I thought that there's still more profit than what my targets are. I'm an adventure type of investor/trader and with this kind of market being unpredictable, you just can't fully rely on research, data, and development. All you have to do is trust your intuition and be fearless when making a decision even it is associated with some risk.