Regulators in Europe have tried to pressure the European Commission to put Bitcoin under a magnifying glass in one way or another. However, there are other characters that sometimes make us believe that these efforts are over, at least for now.
I don't really see how bitcoin itself can be regulated, the money flowing in to and out of bitcoin can be regulated in terms of tax evasion, money laundering, corruption etc, but those are all things that come under law already so no further regulation is really needed, just perhaps a different approach to it.