this is my only thoughts or opinion about why government wsnts to ban bitcoin. Bitcoin is known as digital currency because of that government cannot be trace or track the transaction inside the system and can't control the money flow inside. Some of the transactions here are illegal like purchasing weapon, drug trafficking, extortion, fraud, scam, hackers, and money laundering. It will be a big threat to our country and citizens security. But I hope one day government will seee the brigther side of bitcoin and see how they can contribute in our global economy.
Your right and one more thing just only my opinion too.They are want to ban bitcoin not only because they can't trace the transaction on it or to be the country secure but also they are not collecting the taxes that govenment need like on the bank they collecting taxes in every transaction we've made.We can't deny that most of the politicians want our taxes and corrupting it for they want or for they self to be more rich.That's why some other country doesn't have a progress in economy because of this attitude.