I don't think that's true. The rich will definitely earn more money than people like us just because they are also investing money much larger than ours. But if their investment fails, then they also lose a lot of money compared to us. I believe that investing is not for everyone, and definitely not just for rich people. You can still diversify your investments if you don't have that much money. As for me, I invest mostly in BTC, ETH, a small bag of alts, and shares of a stock. It doesn't matter how much you invest, its how you invest it that matters.