Very solid advice and one that we have encountered numerous times but yet we keep deaf ear to, keeping our crypto in centralized platform is a no because of the so many cons of centralized platform. Exchanges are one of the platforms that newbies use in storing their crypto and that's a wrong move by thm but they won't learn their lesson until they lose accessibility to their crypto. My best advice is " if it seems unrealistic then it is, when it looks like a scam, it usually is a scam. I have used this advice to avoid several scams that I would have fallen victim too if I hadn't known to be watchful of the projects that I get introduced too.