Are dreams the training section of our simulated reality? Your thoughts are instantly manifested in a dream and there's a learning curve to dream control. While in "real life", you can supposedly manifest things through thought/visualization/etc. I'm not sure if I fully believe we're in a simulation, just a hypothetical discussion.
No.
ill tell you if we do live in a simulated reality (which we don't) its shared
sure it can function as that
sleeping is really just a cooldown/repair phase for your body. a good portion of you is released from your body when you sleep. not as much as when you die but it still happens same idea.
sometimes dreams have have real meaning but not always