From a straight expected value case, it can still be an easy call - cryonics has a nonzero chance of working, and p(doom) is less than 100%, and cryonics doesn't cost much (for his class of worker).
A low-cost, low-chance wager with an insanely high payoff (more life) is an easy lottery ticket to justify.
It probably does indicate that he puts an extremely low weight on Basilisk-like futures, where he gets resurrected just to be tortured forever. I agree that this is orders of magnitude less probable than other cryonics-works scenarios.
4Vladimir_Nesov
(My point is more that there will probably be no natural "end of stelliferous era" at all, because the last stars that are not part of some nature reserve will be disassembled much earlier than that, and the nature reserve stars could well be maintained for much longer.)