scams have been happening for as long as the human race existed and laziness was a part of its nature. probably in stone ages when man found fire, someone scammed him and stole his fire too! but scams have never stopped anything because they only target a certain types of people, the idiots who believe anything. and they only shape up a small part of any community.
in fact if cryptocurrency would need to attract more people in order to reach mass adoption and maybe become worldwide (while still prioritizing its values in that case decentralization among others), it will be a requirement to have a secure place.
being secure is not about whether someone pulled a scam or not, it is about how easy it was to pull that scam. for example being secure for bitcoin means whether you can steal someone else's bitcoin from their wallet not whether it is easy to fool them into giving it to you.