He should have offered refunds to anyone who asked and he wouldn't be in this mess. He could still mitigate damage to his ass by giving refunds even now, but so far I haven't heard of even one customer receiving their bitcoin back.

As bitcoin value increases it will become more and more in everybody's best interest to go after him for a refund.

Up until this DeOS thing he had an internet presence, but now it's obvious he is keeping a low profile. With his particular career choice it will be impossible for him to keep a low profile forever, and once he is out of bitcoin and out of money he will slip up and make himself easy to locate once again. It is quite apparent he isn't doing anything but playing video games now. If he were as smart as he thinks he is he would be putting those bitcoins to use to create an actual business (like say a real blockchain-based operating system maybe?).