We are just humans which it is really that normal that we would be able to feel out some greed and fear
But we can minimize greed and fear as long as we know how to overcome them. It's very natural when we become greedy and feel afraid because indeed that is our nature as humans, something that everyone must have. We have repeatedly been through situations like this, so don't let us fall into the same hole because we are overcome by fear, which actually has a solution for it.
A bear market like this will be an event that is sure to inspire fear, and don't let this (fear) be exploited more widely by FUD makers.
We have emotions that is why we feel but this kind of behaviour or habit is not good and we need to change it for our good. The only positive impact that I can think of about greed is that we can learn that it is not good for us and for others and we can realize that we need to control our emotions and give chance to others, the same with fear, it can be positive to us towards making us safe but the same time how to play safe even if we have fears.