The total wealth of the top 20 billionaires has doubled from $672 billion to $1,397 billion since 2012, according to Bloomberg Wealth. source https://www.hindustantimes.com/world-news/2-153-billionaires-richer-than-4-6-billion-people-says-oxfam-study/story-PnrborUdku3aUtyJ9TK5TO.html