I have no idea what your point is. You could make the same point for just about everything. Starting a restaurant doesn't help anyone because you're just buyi

I have no idea what your point is. You could make the same point for just about everything. Starting a restaurant doesn't help anyone because you're just buying food ingredients, labor and real estate and turning that input into food and anyone can do that so you're not increasing the supply of food. Investing money in the stock market certainly doesn't help anyone since you're just buying existing securities that were already issued. The economy as a whole is full of things that aren't that important independently that you could make a convoluted argument against, even those things often add up to a functioning economy with a robust system for price discovery.