Snowden Leak Suggests NSA Is Extensively Tracking Bitcoin Users :The U.S. National Security Agency (NSA) has been reportedly monitoring the bitcoin blockchain with an eye on identifying users on the distributed network.
Link for details news:https://www.coindesk.com/nsa-reportedly-eyes-to-scrap-bitcoins-anonymity/
I think bitcoin has a good forward purpose, all bad results are people or groups with bad intentions and goals that make bitcoin bad All that depends on the person who runs and uses for what not bitcoin we have to judge for something bad