Are you attempting to convince him just of the sensibleness of cryopreservation, or of the whole "package" of transhumanist beliefs? I'm asking because 3-4-5 are phrased as if you were advocating mind uploading rather than cryonics.

Also, 3-4 and 5 are directly contradictory. 5 says "if you believe in the existence of replicas, why would you still care about your life?", while 3-4 say "the existence of replicas doesn't make you care any less about your own life". While it doesn't sound like a productive line of inquiry, the opposition is so blatant and direct that I'd be strongly tempted to point it out.

1 reveals a possibly deeper disagreement, and is somewhat more linked to your reply:why should he care what the universe does or does not care for? Could you possibly convince your father to accept egoism?

(Aside: are you Mowshowitz, by any chance?)