There's always a way to estimate how likely something is, even if it's not a very accurate prediction. And mere used like seems kinda like a dark side word, if you'll excuse me.
Cryonics is theoretically possible, in that it isn't inconsistant with science/physics as we know it so far. I can't really delve into this part much, as I don't know anything about cold fusion and thus can't understand the comparison properly, but it sounds as if it might be inconsistant with physics?
Possibly relevant: Is Molecular Nanotechnology Scientific?
Also, the benefits of cryonics working if you invested in it would be greater than those of investing in cold fusion.
And this is just the impression I get, but it sounds like you're being a contrarian contrarian. I think it's your last sentence: it made me think of Lonely Dissent.
The unfair thing is, the more a community (like LW) values critical thinking, the more we feel free to criticize it. You get a much nicer reception criticizing a cryonicist's reasoning than criticizing a religious person's. It's easy to criticize people who tell you they don't mind. The result is that it's those who need constructive criticism the most who get the least. I'll admit I fall into this trap sometimes.
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
July Part 1