In the Immortal Cultivation World, Spirit Stones are money.
That stuff can't be eaten or drunk, and despite the immense Spirit Qi it contains, it is full of impurities.
Cultivators wouldn't dare to directly absorb it unless they were on the brink of life and death,
Most of the time, it's used by powerful factions to activate Arrays and wield large Magic Items.
As for the rumored Top Grade Spirit Stone, the Spirit Qi inside has condensed to a stage of unparalleled purity, which cultivators can directly absorb.
However, such a good thing isn't something ordinary cultivators can reach.
Leaving aside Top Grade Spirit Stones, normal Spirit Stones could indeed be used as a universal currency due to their rarity.
Moreover, the right to issue this currency is basically in the hands of the Great Sects.
The reason is simple, the stronger the Sect, the better the Spirit Veins they can occupy.
And Spirit Stones are produced from various types of Spirit Veins.
