This post is for reference and is not intended to stand alone. It may be periodically updated with additional appendices.

Appendix A: Cryonics and x-risk timelines

Over the past few years, some people have updated toward pretty short AGI timelines. If your timelines are really short, then maybe you shouldn't sign up for cryonics, because the singularity – good or bad – is overwhelmingly likely to happen before you biologically die. But I bet you don't really believe that. You could already have terminal cancer and not know it, or you could get hit by a car next year. If the singularity is positive and results in the revival of those who got cryopreserved before it happened, then even if you expect the singularity in like, two years, you really should sign up without delay if there's any chance you might die before then (spoiler alert: there is).

Alternatively, you might think that if timelines are longer than your lifespan it will be because of some specific future sign (like a clear AI winter or a world war), and you think it's a better tradeoff to buy cryonics exactly when that sign shows up.

This particular point seemed like an important one to flag, since this is one of the big ways a lot of rationalists' models have changed since those older cryonics posts came out, and we don't want people to make decisions wrongly based on cached thoughts.

Appendix B: Non life insurance payment options

Alcor

In addition to life insurance, Alcor's membership application lists ~~(1) trust,~~ (2) prepayment, (3) annuity, and (4) other means. These all fall under the umbrella of 'self-funding.' CI lets you pay in these ways as well.

~~Trust~~

~~The~~ ~~Alcor Standard Trust~~ "has been fully approved by Alcor ... and is therefore immediately available in its existing format and content. [It] is designed to be entirely autonomous from a member’s estate, to provide secure Alcor membership funding."

You can fund a trust with stocks, treasury bonds, life insurance, federally insured money market funds, cash, or other assets approved by Alcor. Linda Chamberlain (Co-Founder of Alcor) is the head of the Trust Department and can guide you through the Trust Approval Process.

Update 9/2022: A commenter reports:

I just contacted Alcor about paying with a trust and they wrote back "Alcor does not accept Cryopreservation Funding Trusts at this time." It seems like life insurance and prepayment are the only options.

Prepayment

If you have a bunch of cash lying around, like, way more than you'll ever ever need, you can prepay out of pocket for your cryopreservation – just give the money to your cryonics provider. They'll keep a portion of it for when you wake up, but for the rest of this lifespan, you just won't have access to that money anymore.

As far as I can calculate, this option is never cheaper than using life insurance, so you should only do it if you are uninsurable (e.g. if you have already been diagnosed with a terminal illness) or if you're in a huge hurry (e.g. you have less than six months left to live)...

...or, I suppose, you could do it if a lump sum of a few hundred thousand dollars is something it doesn't hurt you at all to give away, and you have literally no other use for the money – not even to leave it to family or charity in your will.

Annuity

I don't really understand what an annuity is in this context, although I'm pretty sure it's a thing that's paid in installments. If you want to pay with an annuity, contact Rudi Hoffman.

Cryonics Institute

CI just has their own whole page on this, which I recommend you check out; there's not much point in me just reproducing it all here. Their ways of funding are:

Revocable trust
Transfer on Death account
Prepayment
Prepayment to a third party

CI shares a long message from a member John de Rivaz on their funding page, under the heading "Is life insurance the best way to fund a contract?", suggesting that they recommend funding a CI contract through an investment trust. (For legal reasons, they can't officially endorse de Rivaz's investment advice – same as how HR people will always say "this is not tax advice, but…").

Appendix C: Additional resources

Let me just say that it is damn hard to stay on top of linkrot. 80% or more of the links I followed for this section were either broken or just horribly outdated (e.g. forums that hadn't been updated since 1997). I've used links to the Wayback Machine where possible, but a lot of these pages are dynamic (forums and news updates) or are useful because they link to a lot of other resources, and I didn't have the time to make sure every single linked resource was in turn archived.

International Cryonics Groups:

Europe:

Elsewhere:

Australasia: The Cryonics Society of Australasia
Southern hemisphere: Southern Cryonics
Québec: CryoQuébec

Likely-outdated email contact info for additional groups available here.

Discussion groups:

Informational websites:

Alcor News Archive
Alcor's Library
Ben Best's FAQ
Chronopause (Mike Darwin's blog)
CI News Archive
CI's Media Library
CI's Resource Library
CryoNet (forum archive)
Cryonics Europe (not up-to-date, but still useful)
The Cryonics Society
Cryonics Wiki
LessDead wiki
LessWrong's cryonics tag
r/cryonics wiki
Ralph Merkle's website
Scientific articles on cryonics (Alcor, PubMed)

Informational articles:

A History of Cryonics by Ben Best
A Physician Considers Cryonics by Dr. Steven Harris
Timeline of brain preservation
Wikipedia entry on Cryonics
Why Cryonics Makes Sense by Tim Urban