Why isn't the american dream achievable? 3 reasons

There are a lot of Americans that do not believe in the American dream, or believe that it became unachievable. These people lacking faith, believe that factors such as discrimination and unequal opportunities provide barriers to one's chance of reaching this "American dream". While others believe anything is possible with determination and overcoming obstacles. Some believe that coming from nothing and becoming insanely successful is only a myth, many have lived it, one of them is Oprah Winfrey, one of the richest women in the world. Winfrey was an orphan raised by her grandma with little money.