I'm looking into suspicious bitcoin transactional patterns and I was wondering whether there is someone with experience in that area.
If we consider transactions as iid data, then what descriptors (aka variables, statistics) would we investigate to infer not fraud - as fraud is a judicial decision - but suspicion?
Without KYC (Know-Your-Customer), it's a tough problem to tackle. KYC provides context according to which a transaction may be totally acceptable. However, without context, the same transaction may be perceived as suspicious, which further means that the inference system relies on guesswork.