In the first part of Major's post, I would say all of the 6 statements are true to a greater or lesser degree but greatest is to show God's ultimate power & glory. I was reading how the 1st 6 chapters of Daniel are about Daniel's history but the last 6 are the prophetic chapters. One author said that the 1st 6 and how you apply it to your life is the only way to unlock the prophetic symbols used in the last 6. It is difficult to discuss this book because so much is tightly interwoven. For instance, we are discussing Chapt 2 - Neb's dream and it is difficult not to link this with the statue Neb has made, all in gold, in Chapt.3 that the king requires everyone bow down to. Further, later chapters all expand on the manner and details of this dream in Chapt 2. Plus there are references all over in Jeremiah, Amos, Isaiah, the Gospels, and Revelation. It is amazingly tightly woven to affirm God's plan. The symbols particularly are cross referenced and defined and one really needs to know scripture to sort it out. I think our study should be loose to accomodate and bring this in but try to go chapter by chapter? And folks, feel free to timeline with history as we know it.
In reference to the metals in the statue - notice that along with the decrease in value of the metal - there is an increasing hardness to each metal? I think we are in the time where the good get "gooder" and the bad get "badder" - a polarization.