For cryonics patients to eventually be revived, the future just has to be very rich (like Vladimir says) and contain a few altruists. Sounds like a good bet

Seeing as the theme of this blog is overcoming bias, one ought to be conscious of an overly hopeful bias. It may well be a deficiency of my own imagination but I can't see the notion of reviving old geezers having much of an appeal for future altruists but that doesn't even matter: It's likely that technology will be sufficiently advanced at some stage to postpone ageing and death and it's probable that this will happen *before* the technology exists to revive "dead" people cutting at a stroke the financial viability of cryonics companies and the income stream which keeps their freezers from defrosting. Should that happen there just won't be any you for a future altruist to revive should they even want to.