An estimated 9.5 billion in world are worth $ 37.2 trillion , Merrill Lynch reports . World 's elite rich donated an estimated $ 285 million to charity in 2017 . Philanthropy can demand a response from host countries .
An estimated 9.5 millionaires in world are worth $ 37.2 trillion , Merrill Lynch reports . World 's elite rich gave an estimated $ 285 billion to charity in 2006 . Philanthropy can spur a backlash from host nations .