You pay attention. DASH, Monero and Zcash have been listed in the top 3 crimes altcoin commonly used.
According to Jarek Jacubchek, a security expert at Europol, while Monero uses non-transparent bockchain technology, DASH arranges transactions in a way that no third party monitors the cash flow. . Zcash has special security that prevents access to and control over illegal sources.
Maybe this price of 3 coin will down people to monitor the situation offline.
Fiat money is the most untraceable currency, namely dollar. This currency is the top currency used by criminals until today. They should do something about it before blaming any cryptocurrency because cryptocurrency had a small percentage in involvement with circulation of money used by the criminals.