The idea of "buying more money" isn't really how it works. In fact you can't even "buy money". You can earn the money (Or is this you way of saying to earn money: "Buy money by selling your skills"?).What you're talking about here is more like saving and investing your income, which is actually a good plan to increase your wealth in the long run.
When you mention "invest more money," and talk about it, it sounds like you're talking about reinvesting profits. That's a good way to grow your investments, but you got to make sure you're putting your money into the right stuff. Diversify, do your research, and don't just blindly throw cash at things that "promises" you to give huge returns.
Understood what you are trying to say, but the terms you used might confuse people a lot.