An ethical way to make money is to give products of your work to other people in exchange for their money. Cryptocurrencies produce nothing and satisfy no needs. Crypto traders take other traders' money in exchange for what? A hope that in future it will be possible to take more money from yet other traders? Crypto traders should not cry that they are victims of a pump and dump scheme because it is the same thing they wanted to do to others. I have no sympathy for them at all.