I dont believe that government will give importance in tracing someone using BITCOIN. Why? using BITCOIN is not actually required your complete identity which is requiring your BIRTH CERTIFICATE so you can register using dummy names, the important in having bitcoin wallet is when you buying using your fiat currency to Bitcoin digital currency  so government have not interested in it. The goverment only focus on their economy to improve and protect it from any unregulated currency which cryptocurrecy is also present, the bitcoin is highly used  for future improvement in dealing with money. Newly advance technology evolving in our generation today is the ICO'S.