Money is a form of speech, in that it communicates values. Sometimes freedom of speech requires strong anonymity. I see no reason money shouldn't have the same characteristics. The alternative---that governments and other entities get to surveil all our monetary speech/actions---will only have further chilling effects on freedom and civil society.
We need monetary privacy to preserve ordered freedom in society, not to buy criminal services.
I'm glad police are trying to reduce DDoS crimes.