I don't think saying people need to take responsibility for their actions removes blame from the supply side. I think the underlying point trying to be made here is that both are at fault. I mean, with crypto, you are the supply side the moment you buy in, and are just as complicit in the Ponzi scheme as the guy you bought from. Being more ignorant than the other players buys very little sympathy from me when you're both playing the same game with the same information available to you.