I think predictions come true because they are destined to come true and also because people make them come true because it was already predicted. Predictions come true because they are destined to come true because once there is evidence that something is going to happen then its going to happen because its destiny. For example, you are on a tree and you know you are sitting on the branch to close to be able to fall of. Next thing you know you are falling off the tree. In the other hand, when a person predicted something is going to happen and that person likes that prediction then they are going to make that prediction happen for their own selfish reasons.