(Bloomberg) — The share of global wealth held by billionaires surged to a record during the Covid-19 crisis, according to a group founded by French economist Thomas Piketty.  About 2,750 billionaires control 3.5{21df340e03e388cc75c411746d1a214f72c176b221768b7ada42b4d751988996} of the world’s wealth, the Paris-based Global Inequality Lab said in a report Tuesday. That’s up from […]