I think he is desperate. Maybe he has some huge financial obligations looming and needs to prove somehow that he is solvent. Clearly he exhibits almost all characteristics of a con artist, who has entered the narcissistic self-delusional mania phase, shortly before his system of lies collapses.
After seeing his pictures and self-portrayal, I felt sure form the first second that I never want to do any business with this person. Interestingly Gavin did.
ya.ya.yo!
What Gavin said was Wright fitted in with the Satoshi he knew: "sometimes prickly and difficult to deal with".
See the following interview at 0.43:
https://www.youtube.com/watch?v=pNZyRMG2CjA
Gavin had the most correspondence with Satoshi, and I bet they argued over details as they were working out the bugs in the project.
The bitcoin space at large has mythologized Satoshi as a sort of selfless saint who never spoke an unkind word and who was perfect in every way. And that's partly why some people are upset - an unpleasant person had the technological idea of the century!
BTW if he moves the coins, then he is Satoshi, no question, though there will be the desperados badly wanting to believe that he somehow stole the keys. I can see the headlines - Hacker hacked Satoshi!