It happened all before with Cyprus in 2013:

Shares of the cyber-currency bitcoin have surged in the past week as investors seek safe havens following the unprecedented bailout of Cyprus' banks.

http://money.cnn.com/2013/03/28/investing/bitcoin-cyprus/

And today:

Schaeuble Warns Defaults Can Surprise Before Greece Test

“Experience elsewhere in the world has shown that a country can suddenly become unable to pay its bills,” Schaeuble said in an interview with Frankfurter Allgemeine Sonntagszeitung published Saturday.

http://www.bloomberg.com/news/articles/2015-05-09/greece-huddles-with-creditors-ahead-of-ecb-test-as-support-slips