this is not exactly "greed" it is called newbishness.
because when you are a newbie you obviously don't know what is going on. so instead of using your experience (which doesn't exist for newbies) they have to rely on their emotions and the advertisement they read from other pumpers that are fooling them. as a result they end up thinking they can make more money and continue bag holding instead of cashing out.
I think they are not getting mistake on holding their investment even if they continue accumulating more and more crypto to their porfolio. What they are doing is really supporting the market to make it stable through hodling. And if the volume of newbies will increase further soon, they are as important as whales to consider.