That’s what journalism is for.

¿Por qué no los dos?

Journalists got to Theranos first, and short sellers got to Nikola first. With both in play, the odds of a timely exposé go up.

Worth nothing that Theranos wasn't public, there was no opportunity to short-sell. If there had been they might have been exposed much earlier and done a lot less harm.

I knew several people who said what they were claiming was impossible but they didn't really have any interest in being the whistleblower.

Only one of those things is beneficial to society or business.

Care to back up that opinion? I'm quite curious to know why you think Hindenburg exposing this fraud to the world, and consequently saving countless more people from being scammed, isn't beneficial to society and legitimate business.