Unfortunately Greeks recent history is not positive in terms of managing their national debt. It was not surprising that government reached out for money of their citizens to help itself.
If you are living in any country with similar problems and suspect that your national currency is not so stable, don't invest in it and don't keep it!
I see numerous comments about Greece in this forum, and the easy thing to say is that "Greeks didn't manage their debt".
The thing is, that you don't really know when the time comes where your country suddenly has a debt problem. Imagine living in a country with a 110% Debt/GDP ratio (a normal ratio nowadays), everything is fine, until one day some EU officials decide that your debt is a problem. And your country suddenly needs a bail-out. Things can go south very fast, if someone decides that your state debt is a problem.
Also history of Cyprus and Greek show, that your money stored in banks are no longer fully yours...
That's exactly what I described in my blog post earlier:
Are your money safe in a Greek bank? Think twice.