That’s not quite what I was getting at. I was describing what would happen if everyone buying a stock did so because everyone else was buying it.
You might only be following a single person (your friend, who said it’s the next big thing, and they’re already made 15% profit!), and they in turn might have only followed a single person, but if it’s just one massive chain of people following each other, and none of the people in the chain stopped to analyse what the intrinsic value of the stock was and are just buying regardless of price, that price will be rising over time, most likely above the stocks value.
In general, buy low, not because someone else recommended something.
(That said, everyone reading this should definitely vote for my stock requests 
)