Cybercrime is a lucrative business, with some bad guys making an estimated $20,000 per month or more. Money laundering is the process of disguising the proceeds of crime by integrating it into the legitimate financial system. The bad guys do so because spending illicit money can attract unwanted attention, and it is difficult to explain where the funds came from. P2P marketplaces such as Uber and Airbnb have also been exploited by criminals looking to launder dirty money. The difficulty of policing thousands of transactions across multiple territories is testament to the ease of policing.”]
Source: https://www.darkreading.com/attacks-breaches/how-cybercriminals-clean-their-dirty-money