Uncertainty is a very bad thing. You never know about the output of your trading by being greed which is way too risky. Having said that, I think that neither greed nor aggressive should be relied on fully.
One should have a good plan, a set pf precise analyses and only then trading could be profitable. This is just for trading crypto which is not very easy. My opinion about greed in other businesses is different. Yes, there is a very little difference between greedy and being ambitious. I will not say no trader should be not greedy but the level of greed must be based on our analysis and must be within achievable range.