I've always wanted to design a slot machine that traded a few NASDAQ stocks. You go into a bar, run your credit card and stick some money in the machine, buy/s

I've always wanted to design a slot machine that traded a few NASDAQ stocks. You go into a bar, run your credit card and stick some money in the machine, buy/sell some shares (with leverage?), machine owner skims off fees, cash out when done. I never thought day trading worked very well and given the number of non-human brains on the other side (plus the overhead), the odds are good that the odds are bad.