I dreamed that an old man told my fortune and said that I had violated my destiny. I woke up inexplicably before I finished. Please tell me, what does this mean?

The old man in the dream represents wisdom. This is a dream that reminds you of your life. Nine is the extreme of yang number, which may have no meaning in dreams.

To violate the destiny is to violate the heaven. For example, are you obedient in character? Are you obedient with your teachers and parents? If not, it needs to be improved.