I agree there's certainly a difference, but what you might consider grifting someone else might consider quite legitimate. e.g. I think essential oils and energy crystals are grifting, but many people find a lot of value in those things and I would never want to suggest I know better what they should spend their own money. They probably would see the money I spend on things like tech toys equally as stupid (and they might not be wrong LOL).
Someone using something unethically does not make the thing being used unethical. Encrypted communication is a great example of this...how many people circumvent local laws with encrypted communication in order to reveal crimes against humanity? There have always been unethical laws somewhere in the world as long as governed societies have existed.
That's not even what i said. I said the other direction.
Ponzis are unethical, and wrong, and it always should be regardless of who is doing it and whether someone is benefiting from it.
I find crypto useful and innovative. I find making money through ponzis disguised as innovation wrong, they happen to be using crypto. That's what Luna was.