There is no authority thanks to decentralization to regulate and be able to prosecute such people/ devs/ whales.
This is a free market and everyone are free to choose, they are free if they want to donate their money to others.
You can't control stupidity.
I guess even in the centralized systems, it will not be possible to control/prevent this kind of manipulations because when traders themselves forming some big group in order to take control of some stocks, I guess they will be finding the loophole in legal issues to make these in favour of them.
Greedy investors not caring about other people deserve to lose their money.
It would be hard for investors/traders to find differences between the real potential and interpreting charts for entering into trading. When traders just going along with the technical analysis, they get trapped by these kind of inside information.