The metaphor used by Gatsby to describe Daisy’s voice goes back to the main character’s life story. In his youth, Gatsby was relatively poor, so becoming wealthy was his primary goal. Jay compares Daisy with money since he needs to win her back. It’s the only thing that can make him feel complete after coming back from war.
Detailed answer:
The novel’s plot revolves around the intricate relationship between Jay Gatsby and Daisy Buchanan. Jay worked his way to the top through illegal means. Now, he attempts to gain Daisy’s favor and marry her. Tom and Gatsby’s strategies to win Daisy’s affection are similar in many ways. But the sources of their wealth are different. The metaphor “her voice is full of money” represents Gatsby’s desire to obtain Daisy’s love. Wealth is posed as a significant attraction for all characters of the novel. And Gatsby sees both values as equal.
In “The Great Gatsby,” the author shows the comparison of old money and new money. The aim is to display core differences in Americans’ beliefs and backgrounds. The novel presents the idea of the American Dream and the blindness of some people who follow it. Gatsby obtains the money he thinks can help win Daisy back from Tom. By doing so, he blindly believes in wealth’s power to achieve anything. He thinks that Daisy is the necessary piece of a puzzle to complete his happy life. And based on all the above, Gatsby compares Daisy’s voice to money.