ATHENS, GREECE - JUNE 30: A man walks past anti-EU graffiti on June 30, 2015 in Athens, Greece. Greek voters will decide in a referendum next Sunday on whether their government should accept an economic reform package put forth by Greece's creditors. Greece has imposed capital controls with the banks being closed until the referendum and a daily limit of 60 euros has been placed on cash withdrawals from ATMs. (Photo by Milos Bicanski/Getty Images)