Did the Crowned Child Represent Anything?

        The crowned Apparition appears in Act 4, Scene 1, as the last warning to Macbeth, "Macbeth shall never vanquished be until Great Birnam Wood to high Dunsinane Hill shall come against him." Macbeth is instantly relieved to hear that he is basically invincible. The Crowned Child then never talks again, but as I read this, I felt like I picked up a connection between two things. There was a reference towards Macbeth being unfit to wear the king's robes, but there is also a child who literally is in king's clothes. The Crowned Child seriously confuses me onto why his design and place is within the play. I think I have a small theory about the symbolism of this Apparition though.
        The Crowned Child Apparition could be a symbol of Macbeth's sense of reasoning throughout the story, for example, how he decides to become king without much consideration to what he needs to do, which could be a metaphor for the child being irresponsible. Another clue to a slight foreshadow could be the tree he holds, which might indicate the forest being moved later. With the last warning from the child being an event that literally could never happen realistically, it's almost ironic how the same sense of reasoning were applied in both scenarios as Macbeth's logic backfires on him while the Birnam forest marches up to his front door.