Greece

The Greeks will go to the polls on Sunday to decide for themselves if they wish to remain in the Eurozone and in order to do so, they have to accept the terms that the "troika" offered. Opinions are split and personally I feel if austerity works, it would have worked years ago. There is no point in proposing more austerity measures knowing well that Greece has an impossible task to repay their debts. Its equivalent to a creditor loaning more of their money to you while you are still in debt yet the creditor EXPECTS to be paid back somehow someday. Refusing to accept their money is futile as they INSIST that this is the only way out (and more austerity measures). I guess this is seriously flawed in a way as a country technically will never run out of money and the worse case scenario would be for Greece to print the drachma which they have been using before joining the Euro. Greece can also "sell"/"loan" their country's assets and use them as collateral in any negotiations.

The media can be used to instil fear in investors as daily headlines would always be something like:

As investors ourselves, we should always learn to ignore the short-term market noise and remain convicted to our portfolios. It is always through panic that the most profits can be made if one is calm and collected. Balls of steel sometimes might help too.

Back to Greece -

Exiting the euro wouldn't be a big deal as how many people portray it to be as Greece's GDP accounts only 3% for the whole of Europe. Reverting back to the drachma would be a short-term pain but long-term gain for Greece as this would enable them to get out of this misery since it started in
2011. Austerity has failed and major change is needed however the uncertainty of exiting the euro can be too much for the Greeks to take. The Syriza government have also failed to impress their creditors with their amateurish negotiation skills and regardless the outcome of Sunday's referendum, I wouldn't expect them to stay in power for much longer. Exiting the euro will cause chaos is utter nonsense, just look at how Poland, Denmark and even Turkey are faring now - none of them are deemed as insolvent nor in a recession. Greece will do just fine with their devalued drachma for a start.

To conclude, I feel the biggest loser would be Germany regardless the outcome and if "Grexit" really were to happen, the euro will be higher than where it was  hence Germany's exports will be deemed as more expensive and we all know what that does to export driven countries when their goods become more expensive. Germany and probably the rest of Europe would of course prefer Greece to remain so that the risk of "hyperinflation" is low.