Comment by Calavar

Gates famously came from a rich family, but Bezos did too - he used hundreds of thousands of dollars in investments from his immediate family members to get Amazon off the ground. Maybe 1 to 2% of Americans would be able draw that much from their family members if they were to launch a startup. If we define "bootstrapped" wealth as starting from an economic background within one standard deviation of the national average, then he doesn't count.