A concept in economics that doesn't get nearly enough airtime is: the diminishing marginal utility of money. Succinctly: the more units of money you've got, the less adding another such unit does—the added value of any one unit drops very steeply.
Over about $200M (personal orbital tourism? Megayacht? Your own tropical island?) there are no more experiences/luxuries that money can buy you. (And over $50M there are very few—bizjet, luxury mansion.)
https://mastodo.neoliber.al/@Legit_Spaghetti/112996254337297288