A joint report by Center on Sanctions & Illicit Finance and Elliptic, a cryptocurrency firm, has indicated that Bitcoin money laundering for illicit activities is highly centralized. process. The report's authors, Yaya Fanusi and Tom Robinson, indicate that much of the illegal Bitcoin is bleached by blenders, saying:

"Blenders have consistently processed about a quarter of Incoming illicit bitcoins per year The proportion laundered by trade and combined games is about constant (66 to 72%) .It should be noted that bitcoin exchanges treated 45% of whitened Bitcoins, but, as they have received much higher volumes, a much smaller proportion of their activity is illicit. "

These mixing and money laundering systems take place only at three sites. In fact, the report states that "97 percent of the volume in their categories and 50 percent of the overall volume" is handled by these few sites.

Metropolitan Bank recently ceased wire transfers for cryptocurrencies, due to the increased risk of money laundering and other illicit activities carried out by Bitcoin. At the same time, China has sought to close the "exchange" sites for Bitcoin, believing that greater regulation and control are essential.