Since value is subjective it cannot be stored. What you've got is a Medium of Exchange over time and space. If you cannot exchange it with your future self (over time) it becomes useless as a Medium of Exchange over space too.
All value can be stored over time and space, it is just a question of how much others will pay, which is subjective.
Is not "Medium of Exchange over time and space" essentially the very definition of "Store of Value?" I believe it is moreso a problem of semantics, as it is challenging to find words to describe these things nostr:nevent1qqsf2h5l8l05c430tmg3cnm89esxf2455wum0fc8r7t9dwky93mxjwspr3mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmqzyzfvhevxrn79yy7a38c2dasggjr0shn0q087ku9p8az4jwq3vsemsqcyqqqqqqgsefk53
And now perhaps we have the explanation: https://primal.net/e/note1733ehdd9ks84v35952wrcn0sgmxklwg4t26yj8quhs6kfu8gpzcq3xsujf
And for anyone else that, like me, has to pull the thread until things are completely unraveled, Knut says it clearly at the 1:10 time mark in this podcast: https://fountain.fm/episode/w5d9svwpCh4oYdPuTDAT