I generally find those that have built wealth from nothing have...

I generally find those that have built wealth from nothing have a better work ethic than most. Same for those that have built a career. It’s not necessarily about the money (though good) it’s knowing they are doing the best in the job they are doing. Those that are given everything don’t understand that drive or addiction.
Something I ponder if I won big on lotto for instance. I would be one of those people that would go into work the next day until I can work out how to make it bigger. And it’s not about the money, it’s my work drive and my mind ticking over to create something better.