I don't think that the governments would ever support bitcoin, as they want to completely control the economy. At best , they can do is to float their own cryptocurrency so that they can control it in some way or other.
It seems that government will support bitcoin but not more than government support the existing fiat. There are many unicorn that emerged those unicorn also increase country economy. Digital payment method is appropriate for it and bitcoin is the best choice. So based on that it seems that government will support bitcoin.