Idk because how good or bad a trait is depends on context. I guess greed could be seen as one of the worst traits seen amongst humans, though it isn't always bad. We evolved to have many of the traits we see within our species because in some way they were useful in our survival. As a result, there is always a bit of nuance to be had when discussing even the more "negative" traits we have.
Greed for money, status, and power has led to the creation of all sorts of horrible power structures that have caused harmed to many. We can especially see this when looking at the capitalist world we live in, where wealth is valued over the well-being of others. You have people with more money than they know to do with who refuse to use any of their wealth to help others, instead trying to horde as much of it as possible for themselves. When people become focused on trying to gain as much as possible with no concern for anyone but themselves then they start to lose their humanity. They stop caring about anyone but themselves. All they want in life is to continue gaining more and more without any care towards how little they even need of that thing. They are never satisfied.