Thorium is very abundant.
Thorium is several times more abundant in Earth's crust than all isotopes of uranium combined and thorium-232 is several hundred times more abundant than uranium-235.[6]
https://en.wikipedia.org/wiki/Occurrence_of_thorium
Very interesting as this might solve the Why no thorium reactors? problem…ans: because their lifecycle creates fissionable products (weapons fuel).
Something else to watch. Maybe AI can fig it out.