The FBI's public announcement that they had seized much of the $4m ransom paid to the Colonial pipeline hackers highlights a broader discussion surrounding the government's cyber crime fighting capabilities in the crypto age.
“It took something like 50 years for the police to catch up with regional crime squads and police national computers and eventually with automatic plate number recognition...But for a while, the existence of the car meant that it was a fun time for the gangsters," said Ross Anderson, a cybersecurity researcher at the University of Cambridge who studies how the police and criminals use technology.
https://www.nytimes.com/2021/06/12/technology/fbi-bitcoin-ransom-encryption.html