For money it's probably not worth our time yeah; even if we could get the money it'd probably be even more attention grabbing than winning the lottery. It'd certainly make people more curious since there's the possibility of an interesting story behind how someone found treasure that isn't there for someone buying tickets.
That said, it could be worth playing with when looking for interesting magical reagents/items.
Not necessarily full on working enchantments, but stuff like those monks' missing bones that has potential utility unworked.
Also, paying someone who's annoyed us on nearly impossible to liquidate doubloons would be the ancient monster version of giving exact change in sticky pennies. So if we have the free time keeping a few around for the purposes of being petty might be worth the time.