You need some very deep pockets though to last long enough. I remember it took years from reading that Nikola is questionable to it going down. Same for Theranos. And Tesla is not a fraud but probably extremely overvalued. But it keeps going up.

Whilst Elon isn't committing outright fraud, he toes close to the line with his promissory sounding announcements and so on.

In any case, the fact we're even talking about this kind of behaviour speaks volumes.