In your lifetime, you would've spent about 6 years of it dreaming. That is more than 2,100 days spent in a different world. Dreams have been here as long as mankind. Back in the Roman Era, striking and significant dreams were submitted to the Senate for analysis and interpretation. Simply because you do not remember your a dream does not mean that you did not dream.
Dreams are indispensable.
A lack of dream activity can mean protein deficiency or a personality disorder. We dream on average of one or two hours every night. And we often even have 4-7 dreams in one night. Blind people do dream. Although their dreams may not consist of vivid images, blind people can clearly recall and describe the sounds they hear or the textures they come in contact with in their dream.