This makes it even more likely that he could just easily fake his own death. Not exactly hard to do when you're anon and over £100k is no small sum to just disappear from an anon account on a message board. The fact that the bitcoins have moved leads me to believe he's more likely alive than not unless you have some pretty concrete evidence that he died (a couple of people on here claiming to know him isn't sufficient though (do we even know if they're not alts or are they also anonymous too?)). I guess his friends or family could have found the wallet and finally cracked the password if they were aware of them but are you sure you 100% confirmed his identity or his next of kin? I know if my next of kin got a random weird email or message on social media asking about bitcoins they'd either have no idea what you were talking about or just ignore it. They'd also probably ask me if I knew anything about it first before responding and if I was alive and holding 250 bitcoins I'd probably just tell them to ignore or deny it.