These numbers aren't all that different from the day-trading figures cited above. Professional gamblers and day traders require the same kind of discipline. They work hard to understand both the game and their opponents and make it their business to win. It's not easy for them, and it isn't a game. Someone who makes a living playing poker could become a successful day trader in a few months, while most of the rest of us could never make it.
Day trading builds sales volumes that encourage the growth of discount brokers.
It effectively subsidizes better and quicker stock information and cheaper trades for us all. If you aren't a day trader, but an actual online investor, you might well say hurray for the day traders.