1. Organized lists are not a magical new technology. A lot better database tech already exists.
2. Almost everything associated with blockchain is fruad-like, skirting nations’ established laws and decreasing security.
3. This type of trading is zero sum. The funds come from a bad place or from someone who has more information than/hidden info from the person they sell it to (manipulated). When you help launder money you’re harming your neighbors, yourself, and your country.