Earlier quoted context omitted.
> How much money is enough for these people? :( What kind of attitude is that? If you have savings, one seeks a return on said savings by investing them. That's perfectly normal and rational behavior at all wealth levels.
It is not rational once you have enough money for you and those you care about to be infinitely comfortable for the rest of your lives. Say you have $100,000 in the bank, and you want to spend $10,000. What's the best use of that money? For a normal self-interested person, a rational use would be to invest in whatever will give the largest return, in order to have enough money for living expenses, retirement, childre…
If you invest your capital, it's not being hoarded in a money bank like Scrooge McDuck. It's being put to use by the companies and institutions you invest in to provide products and services.
Now I'm all for donating to charity, and it's a much better option than leaving massive wealth to your offspring, in my opinion.
But investing your money is totally rational at any wealth level and it's good for society, and necessary for capitalism to function.