Crypto scams are 'sexy', so even minor scams like Opair are interesting to law enforcement now, and wasserman committed a number of traceable cyber crimes so he is a big enough target. The thing with law enforcement is they know they can't catch everyone committing a particular crime, but if they catch just a few and send them to jail (e.g. Ross Ulbricht) they can send a deterrent message which gets them brownie points with their superiors and the sheeple. Wasserman made plenty of rookie mistakes, so you can bet he left a trail cops with badges can follow easily.
What are some of the mistakes he made? Hopefully someone in the FBI will find it worth while to go after him.
Bitcoin - no real money ( in Russia) ... Bitcoin no interest ...