FRANKFURT, June 16 : Binance, the world's largest crypto exchange, is set to lose permission to serve European Union clients from next month because its licence application is about to be rejected, two people familiar with the matter told Reuters. Under new EU rules, called MiCA, crypto firms have until the end of June to obtain a licence to allow them to keep servicing clients across the bloc. Binance's application, made to Greece's market regulator, is set to be turned down, the people said.