The Sun Also Rises: Chapter X~ Materialistic

I have come to the conclusion that Jake is a materialistic and jealous person. In this chapter, he says that, "...I prayed that I would make a lot of money..." All of the characters' lives in some way seem to revolve around money. Maybe because they spend their entire day drinking, dining, and socializing with friends. Jake is also very jealous of Robert Cohn and his new "relationship" with Brett. Jake does not care for Robert, and describes "enjoying Cohn's nervousness" in this chapter. Jake says he is a religious man, but I find this hard to believe in most parts of the story. He doesn't seem to do a lot of praying (unless its for materialistic desires) and he spends his days drinking, being jealous of what he can't have, and wasting his money.