Isn't this basically a Pascal's Wager for science fiction fans?
Geek's Wager would require me to argue, albeit slyly, that cryonics should be preferred over other entropy-defeating technologies.
There aren't any, at present, and so it's sufficient to characterize the set as not-cryonics because the set of post-mortem entropy defeaters contains only cryonics.
And, because it's, you know, a pretty good slogan that wraps the issue nicely.
But if there were other options, like uploads or maybe a plastination-like preservation system, I'd probably not say anything, especially not anything glib. I would no longer feel comfortable telling random people on the Internet where they should place their bets.
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: