Thoughtful post; unearned wealth, with no other purpose but as an end in itself, will never satisfy. If the only motivation is "survival" (perhaps as a moocher, or looter) you'll merely want more and more - perhaps for show, because you crave attention from others - but will never feel satisfied with what you have acquired through parasitical practices.
Wealth earned through conscious, creative work, on the other hand, producing goods and services of value - which includes the creation of works of art - can be quite satisfying. At least, it is for a rational human being.
For example, when accomplished cellist Pablo Casals, was asked - at age 93 - why he continued to practice the cello three hours a day, Casals replied, "'I'm beginning to notice some improvement." (Wikipedia article on "Pablo Casals")
Of course, mere survival does not require billions.
motivation does not happen when you have billions either.
You can motivate other people when you have billions.
https://steemit.com/charity/@steemtruth/secret-billionaire-quietly-gives-his-entire-usd8-billion-fortune-away-in-34-years-true-story