I have very detailed dreams that are like watching a mini-series in living color.
I have made notes just to tell my friends about my weird dreams.
I think they are part just your brain randomly firing things off combined with things you are subconsciously concerned or working on. The second part can be interpreted. All the answers for yourself are inside of you.
Prophectic? No.
I think most dream prophecies were induced by a self induced trancelike state, sleep deprivation, drugs, alcohol. If I take meletonin my dreams are like an LSD trip.
Your belief system, country of origion, traditions decide how much your dreams lead your life (unless you choose not).