So, by this definition, something like .1% of Americans achieve the dream. Seems really wildly out of any sense of proportionality. The American Dream is a nice comfortable middle class lifestyle.
So that's probably HH Income of 75K in most areas (high cost cities excluded). But you know, every city has different gradients and amenities and to put a number on it seems arbitrary and silly.
Shouldn't the dream be "Gosh, I'm really happy with my life!" which doesn't have an income stipulation? I have a friend who makes 40K in DC and is quite happy with his life, versus another mutual friend who makes double but clearly isn't happy.