I think the government is worried about Bitcoin, because if cryptocurrency is widely adopted, then the entire banking system can become irrelevant, bitcoin can also be a virtual crime, because its untraceable financial transactions facilitate crimes such as Drugs, Money Laundering, Terrorism, and other illegal activities.
They do have the basis to worried about it because according to the reports from banks and bankers. Bitcoin is represented for a freedom financial which mean the price is totally controlled by the market and noone can do anything about it, the system is totally controlled by a blockchain which mean there will be no cheats, no corruptions.