He may be worth a lot more than you think. Or he may be in debt up to his eyeballs. In any case, people don’t buy these type of cars as an appliance–they buy them as a fashion statement to impress others.
I have never understood the point of conspicuous consumption, but there are apparently enough people who think it’s a good idea that cars like this Bentley exist. If everyone shared my attitude, millions of people who work in industries based upon showing off/flaunting one’s success and unnecessary luxury goods would be out of a job.