7:188 Say, "I do not even have the power to benefit myself or to avert harm from myself, contrary to the laws of God. If I had the knowledge of the Unseen, I would have amassed abundant fortune, and no adversity would have touched me. I am but a warner and a bearer of good news for those who have faith."
These and many other prophecies were forged by Muhaddithin. Why don't the Mullahs mention the numerous prophecies that never made it? The exalted Prophet came as a guide to humanity, not to make prophecies.
Here is only one example of a famous prediction in Sahih Sahih Ahadith turning out false. "Rasulullah said that there would be no Qaiser after this Qaiser (Harqul - Heraclius 613 to 641 CE) of the Roman Byzantium." But the dynasty lasted long after him.
Anyone can make a hundred predictions today and 5o will come true :-)