Think about what’s going to happen if Greece leaves the euro: a bank account with €10,000 in is suddenly going to have 10,000 drachmas in. A salary of €800 a month will become 800 drachmas a month.
Seems simple enough.
But then the drachma will immediately collapse. Your 10,000 drachma bank account will be worth, say, only €3,000. And that means you’d have been much better off if you had moved your cash to a bank account in Germany, or converted it into euro notes.
When the Greeks figure this out, won’t they start rushing to move money out of the country?