Earlier quoted context omitted.
This was an EU country with a bank deposit guarantee similar to the FDIC guarantee. The guarantee is being voided. How many more EU bank deposit guarantees are untrustworthy? How many depositors will choose to no longer trust them? How many banks will be run? Personally, I don't have a clue as to the answers to those questions, and I doubt that those who are imposing this tax have a clue, either.
Deposit guarantees were designed for one off failures of smallish banks, not systemic debt crises where large proportions of the total debt in a country is worthless. None are trustworthy in this sense, but some countries are worse off than others. Cyprus has a bankrupt government with no access to debt.
It seems extremely unwise to publicise this fact, however - which is what this measure does.