Let's say I have a cartoon artist make a picture of someone famous. I save that picture for a few centuries. Yes, I can do this because I've reversed engineered Doc. Brown's flux capacity to travel into the future. Now that silly cartoon we were talking about has got to have accumulated some wealth, right?
What about a black velvet painting of Elvis? Sure it's tacky and can only hang in a closet, or a bathroom if your lucky, but come 3 centuries or more from when it was created, that's got to have wealth too...right?
Why does Satan assign so much wealth to the Catholic Church? It's because the Sacraments are LIFE ITSELF. This is wealth the devil will never possess, yet he'll cunningly rob souls of such wealth. All other wealth that the Church is accused of possessing is wealth that the accuser (and remember, "Satan" means "Accuser") has assigned by the economic rule of supply and demand.
Thus, if Church sits on high valued property, it becomes high valued property because someone else finds it desirable.
If the Church has high valued art (religious of course) it's because someone else finds it desirable. What is the secular world going to do with a religious painting anyway? Venerate it?
The assigned wealth placed upon the Vatican has been placed to such an astronomical figure that I bet the Pope has to burn his turds less shocked Catholics find it being sold on e-bay.
Behold, what this man holds over his head is the Most Valuable One of All, Who's wealth is more than the entire world and entire history of the world's wealth combined.