There are methods of tumbling Bitcoin (a la coinjoin) where every tumbling round effectively divides the confidence in a sender&#x2F;receiver relationship by the number of people participating in the tumble.<p>So no, such mechanisms are not traceable by any reasonable metric.<p>You&#x27;re right about the volume of plausibly tumble-able money being low, but it&#x27;s at least in the five or six digits per day.