The truth is anyone can become a victim to scam just as you have said earlier, but it's not only crypto related things. There are different methods that scammers are using to get into people's head. Although you are right because the majority victims of scam are mostly the greedy people. A greedy person can not different legit or scam because they actually convince themselves about anything that's involves profits.
Yes, in the online space, no one is safe from scams because scams happen in various methods, and one of the most that's happening lately is the altcoin project team exit scam. or rugpull, which MANTRA is an example. Another example scam which one is FTX. However, the scam the OP used as an example is an obvious one, which I believe can only happen to a naive crypto enthusiast, and according to my research, scams mostly happen to people who are somehow inexperienced in the space. Although the greed may cause it in some ways but when a greedy person fully understands the scammer's approach, s/he can easily let go of his/her greed and never give in to the scammer's offer.