Question for Christians on Daniel 8:14

"And finally, the vision of Daniel 8 climaxes in verse 14 with the

sanctuary being cleansed: "And he said unto me, Unto two thousand and three hundred days; then shall the sanctuary be cleansed."
These four elements compose the vision of Daniel 8: Media-Persia, Greece, Rome, and the cleansing of the sanctuary. 

Q: If the first element, Media-Persia, was so important; and if the second one, Greece, was so important; and if the third one, Rome, was and still is so important-what does that prove about the fourth element?" 

Clifford Goldstein