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 your life insurance company too

No need for collapse. Take a look at e.g. Japan. All its life insurance companies are intact, but the stock market... did not perform well during the past 30 years.