I see some people are still making the mistake of thinking that when someone has $10billion, they have that as just bags of money sitting in a pile somewhere.
A better analogy would be you sitting at a diner with a machine that is worth 100 muffins that makes English muffins at a rate of 18 an hour (3 every ten minute), and which only you know how to operate. If you had 50 starving people walk in, you could only feed 18 of them every hour. If you just give them your machine, then you have nothing, and they have no muffins because they don't know how to operate the machine.
Owning lots of money (even if just cash) is also similar to owning a machine: if you don't know how to operate that money, all you'll have is that money (like having a muffin machine without knowing how to use it), which you can at most just keep trading for something until it's gone. On the other hand, someone who knows how to operate the money will be able to keep making (creating) more and more. That's really the main difference between rich and poor - rich know how to operate the money to make more of it, while poor only know how to spend it. Good example of this is the so-called "Millionaire's Curse," where lottery winners who win millions of dollars often soon find themselves even more broke, destitute, and in debt than they were before they won the lottery.