Yeah, and with the way social media works, there's a decent chance that after establishing a pattern of being able to predict trends, you'll be able to choose them. You don't even have to be a social media manager to make money from that. Sell celebrity status. Or don't when someone comes to you but you can't predict them going viral.
Or on a different angle, you could predict stocks that are about to go viral. Depending on how far in advance, you'll also be able to predict future events and things like election outcomes. If you use your power to become well known on social media and can get stuff about yourself trending, you'll be able to predict your own life. And if you can set trends with self-fulfilling prophecies, you could start revolutions or bring down regimes (or at least generate popular opposition).
Yeah people are hopping on the Amazon one (which isn’t a bad choice) but predicting the future of trends like that is powerful. Especially once you become accustomed to it and can capitalize on them