The total wealth of global billionaires grew to $8.9 trillion in 2017. This is an increase of more than 19 percent from the previous year, This is based on a study released by UBS and PwC. China's ultra-wealthy are the main drivers. China is adding two new billionaires per week, and growing at a rate almost double that of the Americas and Europe; in Asia as a whole, three people a week saw their net worth cross the $1 billion mark.
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