bitcoin is a digital currency . it is money in the digital world. inorder to make it stable currency it should be utilized by many number of people for a longer time. when something becomes famous it is automatically used by several other people. the government will recognize its value when the whole world starts using it and hence it will be stable.
When the government has recognize bitcoin, he will ask the high tax for that. Government always make a tax for anything from his people. I think bitcoin doesn't need intervention from government.