Given that some old-timers are making these posts - It might be the case.
I doubt theese threads are being made trying to shake down some holders to sell, since there is little chance of having the influence to big players who still hold the game.
Bitcoin price is quite unpredictable, and even those who are trading it from start have a hard time making significant profits, unless you have the time to play by the old rule,
wait for unrealistic grow-sell, wait for unrealistic low fall, and rebuy, but since those time periods are so far apart, many traders rather gamble short term trading than waiting.
cheers
I think the threads by newbies with zero activity are often launched in order to try to influence the price. When a thread's started by an old-timer I'm not so sure about it. All the posts they have made over the years have got to count for something.