They may be in search of outsized returns, but I think people can absolutely be victims of the ‘have fun staying poor’ meme. The implication is that if you don’t buy into crypto your assets will be decimated by inflation. I think it’s reasonable to consider that it’s not ‘greed’ but rather fear of being left behind that is driving many victims.

So your environmental criticism of Proof of Work is not applicable here. A PoW coin with no premine doesn't allow for a rug pull.