Twitter operates on algorithms that are written by technology Neanderthals, leaving little in the way for users to offer feedback. As long as they're unable to accommodate frustrated users they'll be unlikely to see any growth in their user ceiling, assuring their internal revenue opportunities will be limited, as well as their stock price.
Furthermore, once President Trump leaves office, the surrounding politics that stimulates twittering interest will decline, making Twitter a declining investment vehicle & a stock shorting opportunity.