A protester holds a banner reading "No to euro" during a demonstration calling for an exit from the eurozone and a "No" vote in the upcoming referendum in Athens on June 28, 2015. Greece weighed drastic banking restrictions to stave off a financial collapse as anxious Greeks emptied cash machines amid fears that banks will be closed this week. AFP PHOTO / LOUISA GOULIAMAKI        (Photo credit should read LOUISA GOULIAMAKI/AFP/Getty Images)