This will not happen in the nearest future. However, governments are positive about digital currency as some countries have already jumped into the idea of creating their own digital currency. But I wonder what to do with the coins in the market if governments issue their own digital currency? I think most of the coins in the market will disappear once this happens.
yes you are right this will take a long time for the government to start its own digital currency, but if they started its own currency then there will be no such freedom as in the bitcoin, it may be under the control of many restrictions, i think after that may be people will still use these digital currency, but the only benefit would be that the useless currency will vanish.