Comment by Fnoord

If you own cryptocurrency, and its all gone down, you're invested and can do two things. You can keep hold of your assets, or you can sell. If you sell, you can decide to share such or not, but since you are no longer invested, there's no incentive to share such (and if you're part of a pump and dump scheme, you don't want people to lose trust so your incentive is to say HODL while doing otherwise). So it makes sense we see a lot of HODL posts; these are people who are invested and don't want an implosion. There's also no way to verify whether the people who claim HODL actually do as they say. Thinking about it, seems awfully close to game theory like prisoner's dilemma.