 In 2017, Mark Zuckerberg was the only person in the top 10 billionaires list who is under the age of 50, and the only one in the top 20 billionaires list who is under the age of 40.In 2017, 500 of the richest people in the world became richer by , according to a report by Bloomberg News.According to a 2017 Oxfam report, the top eight billionaires own as much combined wealth as "the poorest half of the human race".