It all depends on the personal experience and the attitude towards the project. There are a lot of scammers who can ruin the day of investor with tricking him in social media. The experienced investors know how to use the given determinants and there will be victims too. While victims feed the scammers unintentially, professional investors take the opportunities.
We should take note all the time that even a real supporters can also ruin a project if he really wanted to buy more at cheap price and it is easy to manipulate the mind of people nowadays, as if you accuse some project to be scam using a lot of your personal accounts then they will for sure be afraid and can sell their crypto at cheaper price.