I don't think _only_ Elon can solve this problem, but one way of looking at the problem is that Twitter appears to be hesitant to 'solve' the bot problem because their most important metric that drives stock price is the number of engaged users, which includes bots. Taking twitter private (is this actually what Elon is doing? I haven't been following very closely) potentially removes the need to focus on this metric, freeing them to 'solve' the bot problem and not worry about the effect on the stock price when the # of engaged users drops by 40%.