I am not familiar with BTC markets. How would they be able to collect? Wouldn't everyone be watching that wallet like hawk, making it impossible to withdraw without revealing their identity?
There are many exchanges and services where you can sell BTC for XMR (Monero) without revealing your identity. And with Monero you cannot trace addresses or transactions.
I believe no sane service would accept BTC from that address. It is now "stained" and every other address it touches will be too. There are systems that automatically monitor for such scams so it is quite hard to launder $100k.