There are shills who promote altcoins. I have seen brain dead shills posting shit across many social media and promoting totally scam shitcoins. They dont care that its a shitcoin or its a scam project. But often legitimate people fall for them especially the newbies who come to the crypto world.
The issue with shit coins and projects which are collecting huge amount of money is the main reason the governments around the world are planning to put regulations and it will affect bitcoin too when it comes to privacy and so on.People who plan on investing must learn about these new projects rather than going for the gamble,thinking about huge profits.
Panic selling is common and people have their emotions too to keep control of. So its not their fault. However the good thing to do at the time of red market is to hold and see or set a stop loss and sell accordingly in a calculated fashion.
I am not a fan of stop loss when it comes to bitcoin,the market could go down sharply but it will recover too in a short period of time,the only thing you can do is to wait for the market to recover and in my past experience as everyone knows,the price always recovers even if it takes some time.