The latest news is that the US government is look closely at Bitcoin. A number of governments such as Russia and China are also planning to issue their own digital currencies. They clearly see a financial threat from Bitcoin.
What do you think? Can governments kill Bitcoin and replace it with their own digital/crypto currency?
Yes, The government has a power to control or kill any activity under it's jurisdiction most especially if it threatens national security.
but it does not kill bitcoin entirely, only in the sphere of its government alone, so if that's what it means yes the government can do anything against bitcoin, but limited in the scope of its power alone.