Scenario: You discover to your surprise that you can have your fill of every pleasure money can buy, and then you notice you've still got a mountain of that stuff lying around.
What to do?
(1) Pursue power. This never gets old, because there's other guys with mountains of money doing the same thing. No amount of power.is ever enough, because it's relative power that brings satisfaction.
(2) Serve humanity. The ability to amass money on this scale is a function of the scale of society, and that means that society's problems scale proportionately. The material resources you command could have solved all humanity's problems -- five thousand years ago. Today they're just a drop in a bucket, and that's a challenge.
(3) Build yourself a lavish Armageddon bunker.
(4) Any combination of the above.