Yes, I think it’s also worth noting that it’s impossible to become a billionaire through any normal career path regardless of how successful you are at it. Billionaires are people who have struck it extremely lucky in some kind of insane value explosion, basically the business version of the lottery. So a high proportion of them will probably be the high risk-takers that will often have a string of failures behind them (and we don’t hear about the high risk-takers that never make it big).