It is easy to see who has sold and who is holding with these type of topics. For example if you want bitcoin to fall and if you think bitcoin will fall than obviously you purchased at a wrong time and SOLD your coins and now hoping that it doesn't go back up. Because, if it goes back up higher than what you sold you will realize you did a big mistake and should have hold it instead.
On the other side we have people who have bought at a wrong price and now hoping that price would go up and holding and saying stuff like "bull is coming" and all that. Because, if the price keeps falling you know you did a big mistake by holding. Anytime you see a topic titled "bitcoin is going up" or "bitcoin is going down" you know what that persons situation is by just the title name.