Katie Martin made the fatal error of fading a winner.

Katie Martin made the fatal error of fading a winner. Buffett and Munger were brilliant in their simple decision to avoid investing in things they didn't understand. It's easy to dismiss something if you don't understand it (flight before aeroplanes, mobile phones when they were brick sized, the internet when it was for hobbyists), but to actually short something that you don't understand is surely foolish? Maybe Michael Saylor is correct, he has shown great prescience previously, maybe the leverage will destroy MSTR equity holders, but to actively short the stock, wow?