Dreams are Made Winding through my head

Dreaming appears to be something unique to humans. Why we dream is not clearly known but the general idea of dreams is that they are signals that your brain sends out and they are interpreted as pictures. Now this definition may not be entirely accurate but it's as close as I'm going to tell you. Ok so dreams appear to normally be good things and most of the time they seem to be living out fantasy's that you have. But stop now and think is there any point of dreaming? Sure it's fun but couldn't our minds be doing something more productive. Or perhaps we are looking to laterally at this. Perhaps the fact that we dream is just for the mere purpose for our brain to constantly be on the move even whilst asleep ,so with there being very little real stimuli around the brain makes its own  stimuli. This being not what your brain normally experiences means that everything is possible in these interpretations of un-real stimuli. This probobly accounts for the strange happenings in dreams where everything is possible and nearly everything is happening. These dreams we have, have also been interpreted as warning signs that bad shenanigans are amok. This can be normally written off as people seeing what they want to see but occaisionally we will delve deeper into the human pysche and something will happen that was flat out declared a few days earlier or even years.