Gates, slim, Ellison, the Kochs, and the Waltons were all in the top eight from a quick search I did. None of those gained the majority of their wealth through investing.
Buffet and Carlos Slim did, did they not? After starting out in trading (for ~30 years, no?), Carlos Slim got bigger with Telmex (while I don't know how much collusion was involved with that; I assume it couldn't have been none, which probably isn't fair of me) before going large with investing again...
The rest of the list includes Ingvar Kamprad, Bezos, Zuckerberg and Amancia Ortega, and none of them gained the majority of their wealth through inheritance or investment either. Now, their kids on the other hand... :-)
The rest of the list includes Ingvar Kamprad, Bezos, Zuckerberg and Amancia Ortega, and none of them gained the majority of their wealth through inheritance or investment either. Now, their kids on the other hand... :-)