Firstly, I don't think there is any need for the big question in bold, here. Because obviously you're not disputing the fact that not only one plays the role in scam rather the both party does.

It's very much obvious that both the scammers and the scammed plays a very big role in every scam case but the fact that this scammers are just so greed not to go work for their own money rather prefer to take from people who have worked for themselves, that's the only place I blame this scammers hence, I thing the people scammed in the crypto space especially with the Ponzi scheme scam are truly at fault for there lost coins. Greed plays a major role in this scam case most victims are very greedy to the extent of risking their money to get more with someone who you don't even know.

It's just poor to see such scenarios but it's true that both party plays a very big role in every scam, but we pray circumstances don't befall us hence we could be save in the crypto space, because for sure there is no 100% safe place in the internet.