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/
The US government is trying to control its citizens by using crypto currency under the pretext of combating terrorism and money laundering. This is in any case bad, because it is a violation of their rights to confidentiality. True, I recently read that there are significant improvements in bitcoin, among which it is planned to significantly improve its confidentiality.