Where did the Greek cash go?
Relaying from @lumi's answer to this question (not a duplicate though) we see that



As @lumi writes 


  ..."if we look at the Greek money supply figures, and we know that that there are essentially three ways for liability deposits to
  decrease as shown - loan repayment, loan write-off and cash
  withdrawals, we can deduce pretty easily that Greece is experiencing a
  massive outflow of cash. We can assume that some of it is cash
  withdrawals particularly recently, but some of it also debt repayment
  to debt owners outside of the Greek banking system."


For the last months, I would increase a bit the emphasis on "people withdrawing funds and taking them out of the country".