The I Ching does not predict the future. All it does is give you something to chew on, stimulate your unconscious mind. There is absolutely no evidence that randomly throwing coins predicts future events. But reading selected passages from the book itself is quite good at shaking up your accustomed patterns of thought. And sometimes it can be eerily on point, in part because the reader brings his or her own unconscious thoughts and desires to the reading of a text that is by nature ambiguous and subject to multiple interpretations.
The rest of the entry fleshes out and develops this idea, but the above is the core.