i'm not normally one to completely ignore a book based on its "cover", but the very first sentence of this paper gets it so wrong.

"On February 2014, $650.000.000 worth of Bitcoins disappeared."

you mean BTC 650,000 and it didn't all instantaneously disappear. this paper is _awful_. if the authors cannot even get the most basic facts straight about what happened, any conclusions contained inside must be worthless.