She states that the "single number" is a "very conservative" estimate, in part because it's very difficult to track some of the "radically transparent" obfuscat

She states that the "single number" is a "very conservative" estimate, in part because it's very difficult to track some of the "radically transparent" obfuscation in the cryptocurrency world. In addition, being able to state that X worth of cryptocurrency disappeared into a tumbler or mixer isn't particularly transparent, either.