I think you are missing the point of volume that I made. If you have 100 times leverage then instead of making a trade worth $1 you will make a trade worth $100. Whether you make the $1 or the $100 both will get counted in the total volume. I am not saying people can't make fantastic returns, but there must have been enough volume in the market for those returns to be possible. Right now you are essentially saying that someone could have made $10,000,000 by selling a house for $100,000 dollars. It doesn't matter if you bought the house for $1 or $100,000. It also doesn't matter if you paid cash or put zero down. You would not be able to buy a house then sell it for $100,000 and make $10,000,000.