Congrats, that is truly phenomenal. Would you mind letting us know what type of strategy you are using to generate these types of returns? You don't have to give away the store, even a general idea would be appreciated.
Successful day traders can indeed make very high returns. For an individual, it's just way more difficult to lever it beyond a certain point. You can daytrade the piss out of $10M - It's quite another thing altogether to put $500M to work on an intraday only basis. Just my own 2 cents, YMMV.