Can you explain what you mean by future-predicting dreams? Do you mean that when, in your dream, your grandma said that cookies were on the fridge, after you woke up you found cookies on the fridge? That's something that you would know anyway. Even if you had consciously forgotten that there were cookies on top of the fridge, it would still be remembered by your unconscious mind.

Dreams can reveal things that are hidden from your conscious mind; that isn't the same as predicting the future.