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/
This is good because this is for the sake of the national security in which they are just doing their job to ensure the safety of the entire nation by monitoring the huge amount transactions of the identified and suspected bad users. As long as Bitcoin users are doing legal transactions with their Bitcoin then there is nothing to worry about the privacy and personal identities. This is no different with the banks and their clients in which they are also monitored of their cash flow and transactions just to ensure that money laundering will be prevented.