I have many friends in Greece and we have discussed this in detail.
The average person have zero disposable cash to store in any investment or commodity these days... for most of them, it is a day to day survival mode.
Unemployment has increased and the tourist market has nearly collapsed, due to the increase of the crime rate, related to the increase in the unemployment.
Some areas are safe, but more urban areas has become a problem, where it has not been the case before.
You cannot invest/store money you do not have... it's as simple as that... you cannot easily emigrate without money.. so you stuck in a country, where the value of your money decrease by the day.
It's only the wealthy people with disposable money, who might benefit from protecting their money in a currency like BTC. {At this stage, even that is a gamble, but a better short term solution than what they have now}
They also complain that they do not have enough merchants to accept BTC as a payment option, so using BTC to pay for your day to day groceries are not a option now.
It's the poor and middle class that is suffering the most.