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Times are getting crazier, because it's hard to get money nowadays, lots of people do crazy things, a few days ago
my neighbor was cheated by his "future" wife out of hundreds of millions of rupiah, the woman hijacked the man's smartphone and withdrew all of the man's savings, i wonder if this guy has Bitcoin on his smartphone, it's definitely not safe, however, fraudsters can come in any form and usually in the form of friends and close people, so be careful with people close to you, it's not a problem if you invest suspicious of them.
Incredible story. I'm so sorry for your neighbour. Returning to the OP's title, do we really need to blame fraudsters, I think fraudsters are fraudsters and they will always be with us, unfortunately. We can't be on guard all the time, sometimes we need to rest and relax, and in those times we may become victims of the mean and dishonest people like that "future" wife of your neighbour. I'm afraid there's nothing we can do about it, sometimes we will be deceived, but we should do everything possible to reduce the number of times.