It's pretty interesting to follow the traces and found where is the largest quantity illicit BTC actually was sent and maybe negotiated.
Being a criminal and wanna launder huge some of Crypto oblivious, this will take you to find an Exchange with liquidity and, the elegible ones at the moment are Binance and Huobi.
Accordingly to a chainalysis report the major amount of the illicit BTC in bulk was sent to this two Exchanges and the crypto Exchanges may also have negotiated them!
Looking at the report, made me to remember when the UPbit Exchange was hacked, and lost almost $50 in ETH in November 2019, and CZ made his compromise to freeze all the crypto coming from illegal activities in Binance.
It's something that Exchanges may face everyday and if they make the statement, actually "meaning it" this fight could have some good support... Let's face it, Exchanges like any business is always chasing profits!
The report from chainalysis only make us see what is really happening in the crypto space, there are tons of illicit BTC moving the Crypto sphere.