I've been involved in a lot of projects that turns out to be scams, or the dev rugs. But still consider myself lucky because I don't invest too much money on projects that are quite suspicious.
That is the number one thing every investor should take into account, don't get carried away with the project to put all your savings, it is important to invest only what we can afford to lose, especially on new project.
...And I've witnessed also hundreds of people lost large amounts of money in the crypto space. And now seeing crypto being the second largest source of scams is as I expected. And it cannot be stop and will never be stop. Few projects already tried to provide platforms to detect scams, provide safe projects for investors yet not all of them are hundred percent effective. Scammer developers keeps on finding ways to crack the system. Our only option is just to get used to it and be wise with our investments.
Unfortunately some people invest in this new project blindly without doing the necessary research or watch to see how the project will progress before putting a huge sum of money.
Some people comfortably invest in project even if the team are anonymous (never compare btc with alts) just because satoshi is unknown and btc was successful some project will capitalize on that and some naive investors will fall for it.
In my opinion, every alts projects team should be properly doxxed to give certain level of credibility, a project whose team are anonymous should not have more than %10 of your investment. It is very likely they will disappear with investors money since they are not known.
Scam can not be stopped but can be minimize if only people can be very observant and stop being so desperate to make quick money.