No doubt billionaires have lot of money to purchase what ever they want, but they never get bore of it because keen to find some thing better than every thing never stops. It’s human psychology that if he/she have something, he/she will always try to buy something better than they bought.
Let’s take a little example if he buy the most expensive car, then he will start thinking about the car better than this one.
Billionaires never get bore of things never from their houses where they live because they go on upgrading them according their choice then how they get bore?
It is very difficult to study the human brain, but desires never end for any one. Every completion of one wish produce many wishes in your mind. Same for the billionaires and same for the common one.