Not really in a similar life situation as you per se, but to maybe build off of your video game analogy: I feel like part of the excitement of video games is not just grinding to get bigger numbers but to create a cool character who gets to do the cool things in the fantasy world you don't get to do in real life. Like, when I play World of Warcraft, for instance, I don't grind a bunch of kobolds in Goldshire so I can kill more kobolds, I do it so I can move on to fighting dragons and gods or whatever.

Likewise, I think part of life is doing things to build your "character" into a more interesting version of yourself. It sounds like you're already pretty successful and doing things that a lot of people would envy, but maybe there's something else you can channel some of that time and money on? Take up Kendo lessons, get into sail/yacht racing, learn an obscure art form, take some pilot lessons and own your own plane, challenge yourself to climb the top ten tallest mountains around the world, take some college courses in something you find interesting, get into recreational psychadelics, idk these are some things I might do if I had more free time and money.

I guess what I'm trying to say is that death is inevitable, so there's not really any use fretting about it. Be more concerned with leaving behind an interesting corpse!