Bill did it with several prime brokers and all had no clue he was leveraging with others as well. This explains his overuse of leverage to the tune of 5x.
It's not too much work at all. It's fairly easy to do unlike day trading, which you must be glued to the screen all day, watching your positions to the close of trading.
You should know stock market crashes don't happen often. The last major crash we had was last year during the height of the Covid scare. So what do you do in the meantime? Stay in cash? I don't think so.