Most of these projects had just one purpose. And that was to make the promoters rich. And in most of the cases, the original purpose is realized. The promoters dumped most of their tokens after triggering the pump-and-dump cycles and in the end most of the tokens were left with the investors. The development stopped after the promoters made their exit. Now the investors have the useless tokens with them, and they can't sell these tokens as they have been delisted from the major exchanges.