"The stone that struck the image on it's feet and became a great Mountain that filled the whole Earth."
The Stone that "smote the image" (Daniel 2:34) is Jesus, & this "great Mountain" (Daniel 2:35) is none other than Millennial Kingdom of God, Christ's Kingdom on Earth, in the Millennium at the end of the Battle of Armageddon. (See Revelation 19:11-21.)
This stone smashes the image by force & destroys it & leaves nothing of it!
It says the wind carried away Man's government "as a chaff" (Se Daniel 2:35 & Isaiah 17:13)
Daniel interpreted the king' dream & advised the king wisely, so the king made him the highest man in the kingdom aside from himself! So Daniel, a young man about 20 years old, became a very important, rich and powerful man.