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This seems ideal for important necessities like water, housing, food etc.
Water isn't like that, and there is no way to make it.
It's about money. If you have a lot you can hoard commodities. If you have little you'll die of thirst, hunger, exposure...
> This seems ideal for important necessities like water, housing, food etc.
On the contrary, such commodities are regulated almost everywhere in the world to limit hoarding and speculation.