wiki:
"In economics, a commodity is a marketable item produced to satisfy wants or needs"
Google def:
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com·mod·i·ty
kəˈmädədē/
noun
noun: commodity; plural noun: commodities
a raw material or primary agricultural product that can be bought and sold, such as copper or coffee.
synonyms: item, material, product, article, object; More
import, export
"the prices of basic commodities have risen again"
a useful or valuable thing, such as water or time.
Etymology
The word commodity came into use in English in the 15th century, from the French commodité, "amenity, convenience". Going further back, the French word derives from the Latin commoditas, meaning "suitability, convenience, advantage". The Latin word commodus (from which English gets other words including commodious and accommodate) meant variously "appropriate", "proper measure, time, or condition", and "advantage, benefit".
Bitcoin is a commodity and it is useful for far more than transactibility.