Fortunately bitcoin came into handy for them to invest on it due to the uncertainty in Greece economy, If Greeks put their hard effort and sincerity they will definitely come out of this financial problems in a few years.
im not sure since its a debatable topic, but some people in greece had very little effect on using it since they had a limit of $60.
and their bank accounts were frozen so they have no access to cash.. those who were fortunate to have money around on them probably were using bitcoin since western union closed down for entire week.