It’s not so easy to identify scams sometimes I would say anything that sounds too good to be true is not real or any investment that promises quick returns or 100% profit is likely to be a scam. Also if an unknown person messages you all of a sudden telling you about an investment that will bring you profit in a short period is also a red flag, so treat any message from any social media platform about a certain investment as scam, never click links from an unknown source, some are been sent via email they are very risky.
There are several red flags we can use to identify scams but ignorance will always make people fall victim to scams sometimes all we have to do is make research online to educate ourselves better. A lot of people will give your information on how to identify scams but i still think you should carry your own research about how to identify scams to widen your knowledge more. A simple search on google would do.
You are absolutely correct, as ignorance is the main reason why most people are really falling a victim and will still blame it to investors or people who are the ones that introduced crypto to them, instead of looking for who to blame, they should blame themselves. Although it's not really easy to identify scammers especially when they are using familiar apps, links, and emails to scams us, it's very hard to identify which one is real and fake but with the rate of it now, we can try and identify it, as you said that any investment that involves 100% profit in return, is likely to be a scam, which are totally right, we should bear it in mind that whatever thing that we didn't suffer to get, it's likely to be a scam.
So anytime we are introduced to crypto or ask to invest either through online like Facebook, etc, and emails, we should ask questions to other investors who already had experience before us to know if it's true or not or better still we can do more research about it to be sure of what we are doing, this way we help us to identify the real and fake from them.