The Bank for International Settlements suggests evaluating cryptocurrency wallet scores based on transfer history

According to reports from Hashnet, researchers at the Bank for International Settlements have proposed in a new paper to score individuals based on their cryptocurrency transfer history. If cryptocurrency has flowed through a suspect's wallet or is frequently traded using protocols associated with money laundering, it may receive a lower score. Each country can set a threshold score to determine whether users can convert that cryptocurrency into fiat currency. The system will target tokens associated with illegal activities while aiming to maintain the permissionless nature of blockchain without collecting user data.