The services that a human would have likely to purchase 10000 years ago are the same he would purchase today. They are not become obsolete, they arent likely to become obsolete in the future. Tldr: scarce resources could became temporary or permanently less scarce, but they still are subject to thermodynamic laws; so they will remain scarce. You want to detain the scarcest resouce from the most liquids, the "better time machine" to preserve value across time.

Things mans was buying 10000 years ago and things you buy today will still be scarce in future. Money is time-machine technology, and you need money if you dont want to perish faster.