If the future me is similar enough to present me, I want him to live. If he's too dissimilar to count as me, I have nothing against him living (although I may not want to spend a lot of money on it). The only reason I would want someone not to live is if that someone had a poor quality of life. If I had an option to sign up for cryonics, I would examine the clauses that (try to) determine under what conditions and with what expectations the frozen people are revived.