What is Fitzgerald's view on the American Dream?

Like all of his texts, The Great Gatsby is closely mirrored to Fitzgerald's life. Based on the novel, one can conclude Fitzgerald believed the attainment of the true American Dream does not satisfy. Many view the American Dream as being wealthy, popular, and successful, and that all of these will make one happy. Yet we see each of the characters in the novel are unhappy with their lives, making the American Dream just a distant fantasy.
Daisy and Tom, as the "old money" couple, seem to have the ultimate American Dream, but they are unhappy in their marriage. Tom is having an affair with Myrtle Wilson, and one can infer that Daisy enters into an affair with Gatsby as well. Though he ends up not being as accepted into society as he would like, Gatsby has a lot of money as well, but he pines after Daisy, his "golden girl."
Fitzgerald lived an ostentatious, excessive lifestyle fueled by alcohol. He seemed to have the American Dream: he became a well-known novelist, he had a wife and a daughter, and he had money. He worked to keep from becoming a failure like his father. However, just as we see in the characters of The Great Gatsby, the success and money were not enough to make him truly happy. He died a troubled man, his wife in a mental hospital, with the world not appreciating his raw talent.

Fitzgerald, author of The Great Gatsby, believed that the American Dream was not really feasible. Gatsby, the protagonist of the novel, has defined the American Dream not only as merely gaining wealth, but also as being accepted into the stratum of society that was born elite.
While Gatsby has been able to gain wealth through mainly illegal means (it is insinuated in the book that he is a gambler and bootlegger in the days of Prohibition), he is unable to shake off his lower-class origins and gain full acceptance into the "old money" class represented by Daisy and Tom Buchanan. In the end, Daisy rejects Gatsby's advances and his attempts to rekindle their age-old relationship, and Tom treats Gatsby with contempt. Though many people appear to like Gatsby and many attend his lavish parties, almost no one (save Nick, the narrator of the novel) attends Gatsby's funeral. Gatsby's money allows him to construct an ornate mansion and to throw thrilling parties, but, in the end, he dies friendless and without any real inroads into the elite stratum of society. His money has not provided him with an education, with a sense of comfort about himself or his origins, or with full acceptance. The American Dream of truly moving from the lower classes to the elite classes is therefore denied to him.