Little late for them now, considering they can only withdraw 60 Euro/day.
it's not like everyone there is poor now, i'm sure some rich guy are investing in bitcoin with their "money under their pillow" in case the situation will be more critical
They are interested with Bitcoin mining, a bunch of new miners will born.... 
i believe they know that it isn't profitable, at best they could go with altocin mining, or build their own altcoin
Why would the people with euros under the pillow invest in bitcoin? The euros are just as good as they where a month ago and will be good next month. The greeks problem is not lack of money or worthless money but problem with sirculation of the moneys. Bitcoin would not help them at all.
the euro is shit, is losing value against USD, better to invest in something that is near its skyrocketing very soon, than sitting on something that will not go anywhere, and surely investing in something that is gonna explode in the next few days will help them a lot...
bitcoin right now look less and less risky than any other asset
Totally agree with that. If you have cash in Euros on you, just keep it. No point gambling it for Bitcoins. If, however they will go back to Drachmas, it will devalue immediately as the government will need to inflate it by issuing new money to repay debts and pay people. Then it might be worth to change into Bitcoins to retain some value and avoid -at least initial/sudden- inflation and loss of value. Tough situation anyway.
Indications are that Greece will be shifting to a dual-currency system, where both the Euro and the Drachma will be permitted. Those who have their money in the form of Euro banknotes have nothing to worry. However, all the new government payments (such as child benefit, pensions.etc) will be paid out in the form of Drachma.
And those stuck with Drachma cant buy bitcoin since noone will sell BTC for a useless currency....
that's why they need to buy it now and not waiting when they will be kicked out from the euro