Except not, cuz it's money he doesn't have to begin with. His net worth isn't a pile of money, it's a constantly fluctuating number based on what the rest of the world think the his various companies' stock is worth. Same as if you own a house and you get a new tax assessment that says it's worth $10,000 less than last year. Your bank account doesn't skrink by $10,000. The max amount you are able to get a loan for might decrease a little, but other than that it's pretty much a non-event.