There are lots of other ways to earn money. If you like a post before it goes viral (sort of what you are talking about with predicting the future) and you can also get paid for comments, or for flagging spam/plagiarized content. I go more into detail on some of these in my post: https://steemit.com/steemit/@baodog/3-best-steemit-tools-for-beginners-earn-steem-gain-followers-and-track-progress