You're treating 'enough' as a fixed quantity and that's a mistake. Just because a business is generating profit (has 'enough'?) doesn't mean that investing mor

You're treating 'enough' as a fixed quantity and that's a mistake. Just because a business is generating profit (has 'enough'?) doesn't mean that investing more into that business wouldn't make it more profitable and generate a big positive return. In fact, investing into already successful businesses to help them grow faster (seems to be what Mark is advocating) seems like a great investment strategy if you can get hold of the cash to invest cheaply.