Cryptocurrencies generally are emerging technology which the government is trying to figure out a perfect way of adopting it into the main economy. There are also other areas of concern such as tax evasion, money laundering etc, which government wants to block.
In 2013 i heard that government are trying to down bitcoin its 2018 bitcoin is still UP and the price is keep increasing. We should invest as much as we can not to afraid about wars government never win.