Which country has the most friendly regulatory environment? There has been a lot of discussion of the most oppressive jurisdictions. Which countries have taken notice of these failures and have set up the best regulatory environment to attract Bitcoin related investment rather than chase business away?
Great Britian is a country that many companies moved their bitcoin related business to. One of the the best countries that respect privacy is Switzerland. 

There are some tax-heaven type countries that have pro-bitcoin policies. 

If you count it toward country Liberland is probably most friendly. 

In this article you can find various contries with an explanation.