It's worse. BTC transactions are eternal and only one really expensive bit of big data shuffling away from being fully mappable as they touch named real people.

It's worse. BTC transactions are eternal and only one really expensive bit of big data shuffling away from being fully mappable as they touch named real people. So as this guy spends BTC, he's leaving footprints, narrowing the search space by connecting himself to things and to people. That metadata is very likely to be what outs him.