Jay Gatsby, the protagonist of Fitzgerald's novel, is a self-made millionaire who has reinvented himself from his humble beginnings. His lifestyle is a testament to the American Dream, where anyone can achieve wealth and success through hard work and determination. Gatsby's grand mansion in West Egg, Long Island, is a symbol of his opulence and extravagance. The estate, with its sprawling gardens, ornate fountains, and lavish parties, serves as a backdrop for his glamorous lifestyle.