The American Dream is about living a comfortable, prosperous (as in more than enough, not necessarily rich) life. The 1950s family with 2.2 children, a car, and a house of your own with a white picket fence. It's evolved since then, but the American Dream is not about moving classes, it's about a comfortable life. And from my observation, most people can achieve this, except in the coastal cities, where single family homes with a white picket fence either no longer exist or are expensive.