It is possible we are on the verge of a Great Depression like event. But possible does not imply probable.
Regarding taxes, you simply buy a term insurance lasting until you are at least 59 1/2, and use a retirement account to save for your future cryogenic preservation on a tax-free basis (and I mean truly tax-free -- you save on a tax-deferred basis, and then when you are proclaimed legally dead the transfer to Alcor is made from your estate without taxes so long as your net worth is less than $5m).
But feel free to invest in a universal life policy instead, as most Alcor members do. It's basically the same thing under the hood, just with a bunch of middlemen taking cuts along the way. Of course the financial collapse that is so drastic that a broad index fund would perform less than 6% annualized is likely to wipe out your life insurance company too. But maybe you'll feel better thinking that you have that risk covered.
It is possible we are on the verge of a Great Depression like event
That too, though I mostly meant the slowdown in economic growth.
and then when you are proclaimed legally dead the transfer to Alcor is made from your estate
A couple of problems here. First, you are obligated to start withdrawing money from your retirement account at certain age. Second, is Alcor happy to start the cryo without waiting for probate to settle?
...the financial collapse that is so drastic that a broad index fund would perform less than 6% annualized is likely to wipe out
I wrote an article about the process of signing up for cryo since I couldn't find any such accounts online. If you have questions about the sign-up process, just ask.
A few months ago, I signed up for Alcor's brain-only cryopreservation. The entire process took me 11 weeks from the day I started till the day I received my medical bracelet (the thing that’ll let paramedics know that your dead body should be handled by Alcor). I paid them $90 for the application fee. From now on, every year I’ll pay $530 for Alcor membership fees, and also pay $275 for my separately purchased life insurance.
http://specterdefied.blogspot.com/2015/04/how-to-sign-up-for-alcor-cryo.html