I don't think that government will do that as of now, maybe there will be a person or organization will prove to government that bitcoin are not that use for illegal way.. bitcoin's era will be a  life changer. what we can't do in present we can do if we legalize btc. like, break poverty. make people use bitcoin as tool to make easy payment for their small business. everyone will loved to use it. government will better to see the bright side of bitcoins uses.