The good sides of Government having control over Bitcoin is that; it will bring a lot of people into dealing with Bitcoin. The demand for Bitcoin will increase as the awareness grows over the reputation and influence of the government. In result, Bitcoin's price will be affected positively. People Holding Bitcoin now will be proud of their patience afterwards.
To be honest, as a creator of this theme, i would choose decentralized. Bitcoin (and alts) will replace fiat anyway, or maybe there will be another way to replace fiat. Both centralized and decentralized networks currently exist in popular platforms.