.. durrr this rock is valuable because it is shiny.
...while it will never be totally liquid, i think its positive features make it an excellent store of value.
some people would tell you not to invest in platinum. ...
I just wouldn't say never on that one. Realistically, we can assume your statement is correct, but this is open-ended. There is nothing saying the BTC world doesn't switch over to UNO because evil people took over BTC and they wanted a fresh start.

Ok, what if a SELF-SUFFICIENT community decided to use UNO? That's a very easy thing to do. Boom! Total liquidity in that community! If we can easily accomplish total liquidity in our minds, it can't be all that tough to manifest, if that's what we decide to do.
People have yet to use ANY crypto remotely close to it's potential. Why not UNO?
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How about this: Unobtanium CAN be a store of value, if the community starts to 'cover' it by maintaining it's value. Not selling below a point, and always keeping enough BTC (or fiat, or PM, or...etc.) on-hand to buy below that point.
With the limited quantity, this CAN be accomplished.
Members of the UNO community are already included in a 'Value Club', whether they know it or not.
Congratulations!