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?
A good experiment in this sense is USA and Europe start trading with the equivalent of crypto national coin (USDT an Euro), this could be easier to be accepted in the market then replacing a national coin with Bitcoin.