I have discovered a website that sells used on the dark net or hacked bitcoins. They also do money laundering but obviously you have to find that out for yourself. don't try this more than once unless you get invited. These guys even offer a proper coin cleaning service.
1 Bitcoin sells for 0.4 Bitcoin.
Check out, https://www.bitcoincleaners.org/
You will be amazed. Comment at the bottom of how you get on. Show others how amazing it is.