The truth is that the government itself is benefiting from Bitcoin, they are spreading rumors only for fear of losing control over the assets of the people.
The government will never want to lose control over its people. They have no problem with financial freedom. If the people have financial freedom then the government will benefit. But the main problem is that if bitcoin is adopted then the government will lose control over the assets of the people. The government has realized that it is not possible to have complete control over Bitcoin, no matter how hard they try, it is not possible to bring the people under a 100% centralized system. And they know that they can't stop people from using Bitcoin.