The government will always be the biggest threat to Bitcoin because they have the power to ban it. Look at China and how they banned any cryptocurrency from being traded if all governments decided to ban Bitcoin then it would be very difficult to trade Bitcoin to fiat I would say unless you are buying Bitcoin with cash it would be impossible since the government could track it. Even if cash to Bitcoin was possible most people would not want to do it because they would have to reveal their identity and there are other security risks when dealing in person. I think most people including me would stop using Bitcoin if it was made illegal.
Absolutely you are right on this statement and it is impacting on the total price of Bitcoin all over the world. I don't know why government are afraid of it. It's a digital currency that will help in economic system but they seem that it will be harmful step to accept bitcoin. Hopefully they will understand the value of Bitcoin very soon.
The government will always be a threat to bitcoin just like bitcoin which is a big threat to fiat. As long as the government does not learn to accept bitcoin legally, then it will always be a big threat. And i think this will last for long since the government won't allow bitcoin to be a reserve currency simply because its decentralized. Big countries too like China and US continue to impose strict restrictions and even banning on bitcoin even if we know how these two countries were bag holders of bitcoin. In the end, its always clear that US is protecting its US dollar while China is protecting its yuan.