The article mainly talks about bitcoin's first two years after inception. Very few people ran a node back then. Interesting quote: The study’s purpose was not

The article mainly talks about bitcoin's first two years after inception. Very few people ran a node back then. Interesting quote: The study’s purpose was not to name names; it’s the job of the F.B.I. and the I.R.S. to bust Bitcoin criminals. But the researchers pinpointed the identities of a couple of the top players who were publicly known Bitcoin criminals: Agent No. 19 is Michael Mancil Brown, a.k.a. “Dr. Evil,” who was found guilty of a 2012 fraud and extortion scheme involving Mitt Romney, then a candidate for president. Agent No. 67 is associated with Ross Ulbricht, a.k.a. “DreadPirateRoberts,” creator of the Silk Road. Naturally, Agent No. 1 is Satoshi Nakamoto — whose true identity the researchers did not try to determine.