Euro Exodus concerns begin again

The Euro is the official currency of 19 Eurozone countries.  While 19 European countries share a common currency, they do not share a common fiscal policy.  Countries such as Greece, Portugal, Spain, Ireland and Italy have struggled with budget deficits, large total debt, and weak economic growth and competitiveness.  Before the Euro currency, these countries could devalue their currency to make their exports more competitive and make it easier to pay off a heavy debt burden with a devalued currency. 

Fast forward to February 2015 where Greece is the most cash strapped nation within the Euro currency.  Will Greece leave the Euro or will they reach a debt repayment compromise with the Troika (European Central Bank, European Commission and IMF that put together large bailout packages in recent years)?  Greece's new Prime Minister Alexis Tsipras has pledged the end of Troika mandated austerity in Greece after his left wing party Syriza won Greek elections in January 2015.

The game of chicken between the Greek government and the Troika has begun.  If Greece does not want to comply with the terms of its debt bailout will the Troika blink and acquiesce to Greek demands to keep Greece afloat and in the Euro?

How will Greece's Euro participation question impact world markets and does a possible "Grexit" begin a Euro Exodus?

 Euro Currency ready for more Greek tragedy?