Neither bitcoin nor paper money has any real value, but notes have national credit support, and what if bitcoin also gets national credit? The government will lose its macro-control policy but it can also effectively eliminate inflation, two relative ratios. Is that a good result? Of course, I know that the government is very unlikely to support bitcoin, but who knows?
i think it is not possible that any government can dare to cancel their own currency and support bitcoin. at least not yet. Because first of all bitcoin is something against any kind of authority or centralizations. Government will not support the think that they can not monitor or control.