The government may succeed in controlling other cryptocurrencies but as for bitcoin it won't be possible  for them,  the government before now have tried to short down bitcoin or to control it but didn't work out for them.  The government will not have any option  to accept  Bitcoin when they understand bitcoin is beyond  control for anyone to to destroy it.  Some countries that used to be big enemy of bitcoin are accepting bitcoin,  this is what happens when they  can't control bitcoin.