Earlier quoted context omitted.
We would totally accept that bet. The closest bet we have right now is bet 11: “At least one human alive in the year 2000 will still be alive in 2150.” http://longbets.org/11/ The tricky part is coming up with a clear agreement about what "cure" and "death" mean here. But there's a lot of good discussion around e.g., the extropians, so I think a solid bet could be created.
Does "Brain in a Jar" count? How about a Ghost in the Shell? More likely this is a bet on if Cyrogenics finally works out.
Or do you mean for your own? This is between you and the person you bet with. If you have a firm opinion, definitely find somebody on the opposite side and see if you can put together a bet.