I think people who are into crafts. They have all of these yarns, construction papers, various tools and stuff. All so that they can say that they have all of these projects in mind that they want to do. But they never do them so they get more crafting stuff and it just eats away storage until their place is practically consumed by it.
I’ve read some really good answers, but imo there isn’t a worst type. This will vary from person to person, some people don’t get buried under the whatever they buy and others do, regardless of what their interests are.