Except that 80 percent of millionaires in the USA are first generation affluent. Google it, primary source is research conducted for the book the millionaire next door.

The impression I got from that book is that the average millionaire is someone in their late 50s just about to retire, and they need that million+ for retirement. Statistically true, but not really relevant to entrepreneurship IMHO.

Millionaires is probably not the right measure. Look at entrepreneurs. From my observation a lot of them come from families where the parents can help if the business doesn’t work out. This help may come in the form of having a place to move back, help with rent, buy a car, have relatives that have some money to invest. You don’t need millionaire parents for that but it makes a big difference.

Except we're not talking about millionaires.