I do not think it will ever happen to bitcoin global regulation
But it's happening, looking at the link.
You can see description of those countries that are starting to regulate bitcoin on their country.
I do not even see any problem with regulation anyway since all it will do is to usher us into a new era, but if we are talking about the whole global regulating, then that is a whole lot to take in at once.
Most of the countries all over the world will have their own response to the way they see cryptocurrency and we may have to see some top ones regulating, but in general, only few will end up having problems with the idea, and we really do not care, and I am sure they will have a rethink as time goes on.