Personally I’m finding it difficult to believe a billionaire can go broke due to the worse state of an economy. When I mean broke. To the extend of selling off properties and barely afford a living.
The economy can definitely affect anyone no matter your financial class in the society. For a billionaire, an unfavorable economy will not have an immediate effect, a bad economy will slowly bankrupt a billionaire overtime. Billionaires who have industries, make sure they site it in countries where their economies are more stable to avoid being cut up by economic crisis.
A billionaire can be going broke, if he doesn't try to change his situation, he can get broke to the extent of him not being able to feed.