I think it's quite a reasonable measures in order to prevent terrorism! Maybe they will not prevent terrorism at all, but will be able to reduce its amount.
From what thI European Union is proposing, we are going to trade the anonymity of bitcoin users so that they don’t completely ban th crypto currency so that they could combat money laundering and terrorism financing , I believe it’s a completely rational thing since it helps fight against crime.
I think this is hard. By being anonymous in Bitcoin trading, how can the government confirm that the transaction is legitimate, not money laundering or terrorist financing? The government will not be able to manage this problem. Monitoring and management of Bitcoin is a daunting task, because it is the nature of Bitcoin: anonymity and security.