LOL at this.  I'm not even a criminal and I can think of many ways just off the top of my head.  I'm sure guys who steal this much have it down to a science.  Daily volume of bitcoin trading is 17 billion dollars.  $60m is a drop in the bucket.  They could easily spread this around and convert this to altcoins or use some large tumbler.  All you need to do is read this story:  http://www.app.com/story/news/crime/jersey-mayhem/2017/11/03/jackson-pastor-sentenced-five-years-bitcoin-scheme/829670001/  This guy was a pastor running a small time credit union and they managed to convert "10s of millions" in bitcoin.  And this is in the USA!  Imagine how much easier it is to run a scheme like this in countries with less regulation.