I saw the Greece ATM picture on Reddit earlier, a very sorry sight for sure.
The situation over there (and potentially for what looms for other nations) is terrible, but I can hardly imagine citizens attempting to buy Bitcoin with their Euros. Surely it is getting access to the funds which is the problem in the first place.
Also I don't think that I would want to secure the majority of my wealth in Bitcoin, to even invest a significant portion I would need to full understand how I would go about procuring coin, and ensuring its safe deposit.
The fact that governments and banks allow for things like this to even come about is awful.
It depends on where you are. If you are in USA, UK or Germany, you know, at the end of the day, your country will take care of you. But, if you are in North Korea, Ukraine or Argentina, you might have to take care of yourself. Learn it from a Venezuelan =>
https://www.reddit.com/r/Bitcoin/comments/3buaay/grecian_here_some_thoughts_you_could_give_me_on/cspqz0eVenezuelan here.
My country has had capital controls since 2002. Buying outside our country is a nightmare. You can get prosecuted for simple things like buying gift cards with penalties such as removing FOR LIFE your annual quota of a paltry $300 on credit cards. You can't use any other means to buy goods or pay services besides credit cards. The dollar has been pegged to a crazy 6.3 VEF/USD since some years ago (up from another crazier 4.3 VEF/USD).
Since half a year ago, i've kept ALL MY WEALTH in Bitcoin... yes ALL. Every single VEF i get, after buying food, gets converted to Bitcoin immediatly.
Not Dollars.
Not Euros.
Not GBP.
Bitcoin.
I have almost triplicated my wealth since i made that move. When the black market exchange rate was 150 VEF/USD, i held Bitcoin. Some weeks ago the black market exchange went to ~450 VEF/USD. Guess what, i feel like a rich man. I can maintain my WHOLE FAMILY OF 5 (food, basic services, debt) with just .3 BTC/month. The rest gets stashed away.
Also, i began mining. 1 Antminer S5 gives me, after electricity costs (which are almost non-existent, electricity cost here is a joke) the same wage my wife and i earn (we're both engineers) TWICE a month.
Your government will do stupid things, i guarantee it. Don't trust a single drachma/euro to them. If you want to hedge, use something like Bitreserve, but believe me, wild price swings aren't that important dealing with Bitcoin when your other alternative is a highly manipulable, fractional-reserve backed, fiat money.
If you want more specifics, pm me.