What kind of work was Gatsby doing to survive in those days?

In "The Great Gatsby," Jay Gatsby was involved in various dubious activities to survive financially. He was rumored to be engaging in bootlegging and other illegal businesses during the Prohibition era, which allowed him to amass significant wealth. Additionally, he hosted extravagant parties at his mansion to gain social status and attract the attention of Daisy Buchanan, the woman he loved. Gatsby's work was shrouded in mystery, reflecting his desire for reinvention and acceptance in high society.