Egyptian billionaire – and owner of Orascom Telecom and Weather Investments –  Naguib Sawiris said he will quit all executive roles at his businesses and focus his time on humanitarian work, following the sale of most of his assets to VimpelCom. “The last two to three years were full of problems and crises, which made me lose my appetite for work,” Sawiris told Cairo’s Al-Mehwar TV station.