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 dont know its bad or not but as far i know, bitcoin is anonymity currency. But not surprising too when hear news that NSA monitoring transfer traffic around the world.