Why do we have all these calculated crazy dreams to support our waking daylight hours

you think about this if you have a lot of crazy dreams does that mean the next day is going to be hectic for you or stressful or is the mind preparing for these things to prevent them or perhaps in some way we are safe guarding our minds ability to use these things during our waking hours making us retarded or so-called schizophrenicperhaps it’s the medicine not adjusting to the serotonin levels that causes side effects that we experience during the daytime when we move around so much at night