Perhaps ddos or hacked? or perhaps his son operated his dad's website for him. You can't just assume.
If that is the case, paying a visit to his dad would be a great idea.
Rich kids get kidnapped all the time and ransomed back to the parents.
Why would someone who is potentially in to deep with pirate not ransom the father back to the son.
Pirate paid amazing returns, Bitcoin is full of black/grey area people.
It is not hard to come up with the possibility someone in these areas borrowed from some serious people, and loaned to pirate, making a few points in between.
Such a person would be highly motivated to place some heat onto pirate, by any means necessary.
If nothing else and it all goes to hell and pops ends up headless in mexico, well pirates got a little more to live with doesn't he?
While I disagree with mod censorship and removing posts containing personal details, in the above scenario it is understandable.
Vigilante Justice is a bitch.
I remember when 4chan tracked down a kitten torturer to his house based simply on a reflection in a picture the guy posted. If pirate slipped up even once he will be found. The guy likes to brag and jingle his coins and that makes him careless 
QFT