I'd like to propose a currency which value is linked to an intrinsic, unchangeable property of the human race: the amount of water needed daily by an average in

I'd like to propose a currency which value is linked to an intrinsic, unchangeable property of the human race: the amount of water needed daily by an average inhabitant of this planet. Mark that I state 'needed', not 'used' as that number varies enormously depending on where you look and who you look at. To makes things a bit easier we'll set this amount to 5 liters, this being slightly more than needed but still a small enough number to work with. 1 unit of this currency will buy you this amount of water both now as well as in the future. This should make the currency worthless as an investment option but stable as an exchange medium, just what is needed to allow this currency to remain viable in the now and in the future no matter how many very hungry caterpillars [1] try to hoard it. Call the smallest fractional denomination a Drop, 100 Drops are a Thimble, 100 Thimbles a Swig, 100 Swigs a Pail, this being the smallest non-fractional denomination. Yes, there are problems here, e.g. how to organise emission of this currency into the market without creating the same problems as current fiat currencies. The basic idea of having a currency which by nature can not be used for investment purposes as its relative value is guaranteed to remain stable over time does serve a purpose but it needs some more thought. [1] https://en.wikipedia.org/wiki/The_Very_Hungry_Caterpillar https://en.wikipedia.org/wiki/The_Very_Hungry_Caterpillar