I think you should sign up for cryonics yourself first. Having you as an example may help persuade.
Also, make sure to shoot down any discomfort about “wasting your inheritance”. You’d much rather they use their money on this procedure that has an unknown probability of success than any other use. If you have siblings, they might need to be onboard. Some people feel strongly about using their money on themselves. They might not admit to it and still feel that way.
I think you should sign up for cryonics yourself first. Having you as an example may help persuade.
Also, make sure to shoot down any discomfort about “wasting your inheritance”. You’d much rather they use their money on this procedure that has an unknown probability of success than any other use. If you have siblings, they might need to be onboard. Some people feel strongly about using their money on themselves. They might not admit to it and still feel that way.