An elevator in a dream tends to speak to change that's moving faster than you feel ready for -- a promotion, a status shift, or a life stage arriving ahead of schedule. A smooth ride can reflect ease with that pace, while a stuck or plunging elevator often points to a loss of control over how quickly things are unfolding.
The Fixed Stars do imitate the nature and action of the Erraticals or Planets, whereof they transfer their actions unto them. - William Lilly (1602.-1681.)