Government supporting Cryptocurrency over it's national currency is not that possible .
But assuming it happens, I believe it would go a long way in accelerating mainstream adoption of the blockchain technology.
The governments won't support crypto currency over their national currency we both know that but the point here is just for them to support crypto so that most people who are scared to used Bitcoin will join the race. But we have the governments support Bitcoin as the topic says then we'll have no inflation, people will be financial ok and the price of market will be so high.