There's a special rule when it comes to capitalizing words for a song, articles, or titles of books that is different from the general rule for capitalizing words. When the situation is the one just mentioned, most of the guides will tell you to capitalize verbs, adjectives, adverbs, and, importantly, nouns. Articles, conjunctions, and prepositions, though, unless they're the first word, should not be capitalized.
The correct answer is that this sentence tells us about Gatsby and the West egg culture is the extravagants and luxury which Gatsby lives by.HE would have so much, from the best but it would all go to waste.