While there is some of that, eventually you reach a point where you don't really know what to do with more money. That is you fly first class, and you see no reason to upgrade to the next level (shared jet, owned jet). Maybe you try a cruise and decide an inside cabin is just as good as the largest balcony room (or something inbetween) and are not interested in owning your own ship at all - perhaps a cruise isn't for you and you still prefer primitive camping in the backwoods with the minimum you can take with you.
Of course you can always spend more money. However I have known rich people who decided their mansion was too large and so they downsized (their master bedroom after the downsize was the size of my whole house!) Eventually what you need is time to enjoy what you have not more luxury. Fly coach or have a private jet on call - end the end you get there, and the jet only saves you a bit of time at the airport.