$100B was created on paper and lost on paper. Net worth is the same concept. Jeff Bezos net worth is calculated based on how much his assets are theoretically

$100B was created on paper and lost on paper. Net worth is the same concept. Jeff Bezos net worth is calculated based on how much his assets are theoretically worth based on current fair market prices. He doesn't have to sell all his assets to determine his net worth. People don't like the "lost $100B in market value" part, but it is accurate since market value is calculated on paper.