It’s hard being a criminal. Surveillance techniques and forensic science are constantly being improved and people are working full-time to destroy your livelihood. That’s why many criminals around the world probably celebrated when the cryptocurrency bitcoin was launched back in 2009…

https://thenextweb.com/eu/2017/02/21/danish-police-hunt-down-criminals-using-bitcoin/#.tnw_2LhMgm0g