Would you blame innocent people for been ignorant or blame fraudsters for been evil, no one told fraudsters to be evil and take advantage of other people. Well I think your only saying this cause you have never experienced such loss before, else you won't be bringing this up.

Exactly. I don't think scam is something that people are not aware of. Their have always been scammers,  it is so Dissapointing that beginners that new in cryptocurrency feel so relaxed and don't care how to make research about securing.  If one understands security very well and knows the right thing to do it will be very difficult to fall for scammers when scammers tries to take advantage.  The reason why most people have always been a victim to scam is because they are not ready to learn and get understanding that will help them to be on a safer side when they come across scammers. 

Ignorance is the reason why scammers get people easily and people are not even ready to learn to be guided .

Fraudster are people that want money and so are not to be blame because it is their means of livelihood, and so they are always at alert to get defaulters of the internet as their clients . The individual that does not keep it's details safe or due to carelessness will lose it to them.

I'm sorry but this doesn't make any sense: I understand that some people are luckier than others depending on where they were born, the family, the education they received, etc etc, but if you decide to commit a crime that is on you. Otherwise we should find excuses also for murderers, etc etc. Scamming people is just one easy way to make money, just like stealing, that's it. If you want to earn money the legal way you have plenty of options but of course many choose the quickest and laziest way.

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.

Frausters have this mindset of hunting for people that will fall victim and we should know that many people has not emecouter fraudsters before that's why the fall to their antics, the crypto world is full of scam that's why every potential investor should get rid of greed, why most people fall to this cheap scams is because they want to use a small amount of capital to make a huge amount in a twinkle of eye which is not possible, most people that has been scamed in cryptocurrency is because if selfishness and greed,  though what you said is true in the aspect of building an efficient cybersecurity to track scammers anywhere they are but the problem is that this scammers are always improving in their antics, so it takes a highly effectient,sophiscated and trusted syetem to achieve this but then individuals needs to be more careful in other to avoid being scammed because this scammers will engage you in conversation to know what you really want before the can come up with your exact satisfiable investment plan and once you fall your funds is irretivable and that's it.

Scammers have been present already even before, and a lot have experienced being scammed already. So if you think being not cautious and careful won’t harm you at all, then learn from the experiences of those who have been scammed all of a sudden.

My point is that no one gets scam if everyone is taking extra care with their finances and investments. We are the ones who are giving hints to those scammers, so the moment they noticed us, we will already be their sudden target for scamming.

It is a terrible thing to make stealing your means of livelihood, that can never be used as an excuse; and no matter how gullible or stupid your victims are, you are still worse off than them. BTC is a decentralized network, so personal security is so important, if you do not secure your coins, you are going to lose it to attackers and there would be no way to get it back.

I somehow disagree with the points you have raised, OP.

Yes, I am an advocate that people should always exercise the most care and diligence whenever they try to deal with downloading applications or registering into a sketchy website. But the fact that there are people who intentionally scam others is not an excuse to a person's ignorance.

At the end of the day, it is all about the existence of these scams. Sure, newbies are party to blame in this perspective but at the same time, why would you scam in the first place? Again, you do not blame the victim- you blame the offender for creating a harmful situation that exposes a newbie's innocence.