Switzerland primary source of income is the banking industry and when they see that a new currency is being developed like Bitcoin of course they are going to adapt to it. Most probably they are already studying on how to incorporate crypto currency to a fiat banking system.
That must have been their line of thought as it stands to restore their safe haven status one more time. It matters to the Bitcoin community that the number of very crypto friendly countries are beginning to add up, no doubt a numbers of countries are keenly observing the development and won't be any surprise to see many countries toeing their footsteps as the popularity and adoption of Bitcoin becomes quite difficult to down play by any country.