(evolution) chance seems to be a significant factor

Richard Dawkins: Every organism that lives is the "elite of the elite of the elite" (end of 2nd paragraph under "Take a giraffe" chapter)--> seems to ignore the fact that people would not be around if they wouldn't have gotten lucky at some critical points (@ the population bottlenecks)

there *may* be something BIG to lose

by trying cryo preservation or similar -- if there IS something beyond this existence, something better then this you wouldn't want to be stuck to a body indefinitely, but we just don't know...

should we just count our blessings?

there is no real guarantee that our life would be anywhere this good a some significant time into the future; you'd *hope* things would just get better but how realistic is that? we may have gotten to live (naturally, without the life extension) during the best of times; is there a point where life is just not worth is anymore? does every individual have a 'suicide point' --> a point where death is truly a better alternative d.