As seen with Crypto, Pump and Dump schemes can ruin someone financially. Market influencing will need to be bannable on youtube once enough ppl do lawsuits on either the youtuber or youtube itself or both.
At some point you're going to cash out and everyone holds themselves nearest and dearest, so they will make sure to cash out before they tell their followers to cash out. So they're basically throwing them under the bus.
I think people should wise up to that and instead of going along with it they should do the opposite. Make the price decrease instead of increase, so they get burnt.