If I even rustle a bag in the kitchen, he can be anywhere and he will suddenly be at my side watching for a treat. There's never a time when he doesn't show up. Greed is self-serving. No one is ever greedy for something for someone else. No matter how much of anything a greedy person has, he has an insatiable appetite to want to more.
Greed is covetousness, with covetousness being a foundation stone in all of the seven deadly sins.
And the devil, taking him up into an high mountain, showed unto him all the kingdoms of the world in a moment of time. If thou therefore wilt worship me, all shall be thine. Jesus had it all offered to Him. Yet, Jesus turned it down. Covetoussness' power over man was broken at Calvary.