There's no reason why the Euro zone should explode because of one smallish country leaving the club.
Then, it's very different from Cyprus, there aren't many wealthy people with big assets in Greek banks.
That is true but what if Spain, Portugal and Italy for example one day decide same as Greece? In my opinion, Greece is only test but lot of countries in EU have big debt problem.
I don't see a reason for Spain, Portugal or Italy to do the same as Greece. If they're gonna do something so radical.