This is not a thing for only cryptocurrencies, every scam on every field is a global issue. And since it is a free market, scammers and hackers may operate alongside hence it is always being announced that investors must stay cautious especially to unknown emails which offers enticing rewards for both known and unknown cryptocurrencies. Keep wallet log in details safe and never follow unknown links that are sent through emails - some may lead to phishing sites.
That's right, people have different mindset an this is why we encountered this kind of problem. Especially this generation that our information rely most in the computer which it has the big chance to be intercepted. Scammers will never be gone because of the system the system. This is why we should be very careful especially when it comes to our asset.