Academic tenure is sometimes described as 'up or out.' You either gain tenure, within a limited probationary period, or you must leave. I tend to think of life like that: either up or out, either promotion to a Higher Life or annihilation. I wouldn't want an indefinitely prolonged stay in this vale of probation.
In plain English: I wouldn't want to live forever in this world. Thus for metaphysical reasons alone I have no interest in cryogenic or cryonic life extension. Up or out! It would be interesting to delve into some of the issues surrounding cryonics and the transhumanist fantasies that subserve this hare-brained scheme. The possibilities of fraud and foul play seem endless. Some controversies reported here. But for now I will merely note that Alcor is located in Scottsdale, Arizona. The infernal Valle del Sol would not be my first choice for such an operation. One hopes that they have good backup in case of a power outage.
Related (and rather more substantive) post: Will Science Put Religion out of Business? A Preliminary Tilt at Transhumanism