> A single human (not mentioning any names) having 100 billion seems crazy.
Technically, legally, the current president of the Mormon church, Russel Nelson, has those 100 billion dollars, and everything else the church owns, because of its corporate structure.
Those assets, technically and legally, belong to the office Nelson occupies, not Nelson personally. It's a corporation sole, which is often used by Bishops of other churches to hold the assets of a diocese. The alternative would be the corporation aggregate with a board of directors.
Technically, legally, the current president of the Mormon church, Russel Nelson, has those 100 billion dollars, and everything else the church owns, because of its corporate structure.