These governments already know what are the goods and bad of this bitcoins, knowing all these facts still they are behaving like dumb who knows nothing. They need to understand the importance of bitcoins and their legality so that every person can use them worldwide and they can be benefited.
Because, government cannot do anything about bitcoin like they cannot stop people holding bitcoin nor stop people from mining bitcoin. As these are all coming under people's basic rights.
All they can do is, may regulate bitcoin trading against fiats. Like they can impose new regulations against exchanges. That is already happening in many countries but we can see that is not at all impacting the growth of bitcoin in long term. When some regulations are coming in, people first get scared but after that they get practice to that and within that regulations they are finding new ways to adopt and to become a successful bitcoiner.