I don’t see a future utopia (or non-utopian) society a thousand years from now feeling at all compelled by a legal agreement between two independent parties a millennium ago. The law firms that set up the contracts will be long gone, the legal framework that established them will have evolved if not been replaced completely. I mean, compare where we are now with where “we” were in 1024, and then think about how much more quickly things change today. Any money is going to be more meaningless than 11th century money, but with no collector’s value since they’re just numbers in a database that probably won’t even exist in a thousand years.

I think we can legitimately view having your body/head frozen in the hopes of being woken up as a tech version of the Catholic last rites.

okay but how do you establish any of those incentives with people who simply don't exist? eventually the agreements fall apart as all parties involved are either dead or cryostatic, and the agreements will have to compel someone who was never party to them to take some sort of action. Like, I guess you could put a reward in trust but even then you'd need some sort of legal entity to manage and distribute it that would, itself, need an incentive in trust in order to continue, and so on in an infinite regression.

I certainly don’t think a utopia is the only option and even have a bit in there about non-utopian societies.

Utopian societies that are post-scarcity are just the most likely to have the resources and desire, and even then I’m not seeing it as realistic.

And how are you going to incentivize something decades or centuries down the line? I’m not seeing that one working either.