Not all of short selling is bad. Sometimes it's an act of activism. Bill Ackman has been shorting Herbalife for years while trying to expose the pyramid scheme

Not all of short selling is bad. Sometimes it's an act of activism. Bill Ackman has been shorting Herbalife for years while trying to expose the pyramid scheme that it is. He was quite successful for a number of years. Similarly, Hindenburg Research, which was shorting Nikola Motors, revealed a lot of fraudulent stuff surrounding Nikola's public statements and their demo truck video.