That's a vapid take. If I have information that isn't widely known, and I have established a vested position, then it is always profitable for me to promulgate my information. That doesn't suggest my information is wrong.
What if I don't have information that isn't widely known but I've people listening to me because I was once right in 2008 so now everyone is listening to what I have to say, and then I use it to influence people to do what I want based on what I say?
Couldn't that be other side of the coin?
it's not information being promulgated, but speculation.
Time will tell whether said speculation will turn out to be right. However, if more people believed such speculation, it might make it more likely to be right in the future. Therefore, there's a selfish reason for said person to promulgate such speculation.