I'm sure that the ATM machines in Cyprus limit the amount you can withdraw from your account to a few hundred dollars per day. Otherwise a stolen ATM card could result in some people's entire life savings being lost to thieves.
Still, your point is well taken. Even if the ATM machines remained fully stocked with cash, the most someone here in Canada could take out each day is $400, or $2800 over the course of a week. That would save them $280 on this money grab if they had over $100,000 in the bank.
But, that's still small potatos compared to the $10,000+ the government would seize.
Cyprus is going to be an interesting place for economists to watch in future since people there will be reluctant to trust banks with their savings. I expect you're going to see a lot more people putting their money in glass jars and burying those jars in gardens and flower beds and such to prevent the same thing from happening again in future.