Not having to adopt the Euro is also a "special right". It's not well known, but all EU countries are required to adopt the Euro (except for Denmark who have a

Not having to adopt the Euro is also a "special right". It's not well known, but all EU countries are required to adopt the Euro (except for Denmark who have a real opt-out). The countries who haven't are using a loophole to bypass the requirement of Euro adoption, by purposefully failing to fulfill some standards. https://en.wikipedia.org/wiki/Enlargement_of_the_eurozone https://en.wikipedia.org/wiki/Enlargement_of_the_eurozone