They want to retain and monopoly to their own paper money. They don't want people prefer any decentralized currency over their paper money. They blames that Bitcoin is evil for a single reason, they say that Bitcoin is a tool for money laundering. But I am amazed that the lion's share of money laundering and bank robberies in the history of the world has been due to banks. In fact, they want to manipulate the economy, they want the rich will die as rich, and the poor will live like poor forever. They do not like decentralized systems and principles of justice for everyone.