Anything can be interpreted any way you like -but that has nothing to do with what they actually mean.
I take all of the book of Revelation seriously. It contains both symbolism and literal descriptions of events, but the "whole thing" was certainly not intended to be a mere metaphor.
Some of the symbols in Revelation are of "beast"s -and this is true of other books, also -such as Daniel. Daniel also gives an overview of world-ruling kingdoms from Nebuchadnezzar's Babylon to Christ's kingdom on earth. It records a dream king Nebuchadnezzar which was given by God. The dream disturbed the king so much that he did not tell anyone what he dreamt -and wanted to understand it so badly that he told his seers/diviners, etc. to tell him what he dreamt -so he could be sure of the interpretation. They could not do so -but Daniel was given understanding by God to explain it to him. He dreamt of a great statue made of various materials which represented a succession of world-ruling kingdoms -his kingdom being the head of gold. The last earthly kingdom was represented as feet and toes of Iron and clay -after which the statue was broken in pieces by a stone cut without hands striking it at its feet -then the stone became a mountain and filled the whole earth.
The symbols of "beast"s in Daniel further describe this succession of kingdoms in more detail -and the feet and toes of iron and clay are described in more detail in Revelation -as the beast that rises from abyss, etc. (and in other ways in other books).
The most recent among these were the Axis powers. The last is now rising out of the E.U.
Please refer to the following for a description of these kingdoms thus far in history...
http://rekindlingthereformation.com/assets/images/Bible/babylon6.jpg
Please also see my last post in the following thread -which I will be explaining in more detail later. I'll post a link when I do.
http://www.religiousforums.com/forum/religious-debates/106591-hell-necessary-christianity-16.html
Here is an interesting description of a modern tank/fighting vehicle by one who had never actually seen one-
Rev 9:17 And thus I saw the horses in the vision, and them that sat on them, having breastplates of fire, and of jacinth, and brimstone: and the heads of the horses were as the heads of lions; and out of their mouths issued fire and smoke and brimstone.
Rev 9:18 By these three was the third part of men killed, by the fire, and by the smoke, and by the brimstone, which issued out of their mouths.
Fire, jacinth and brimstone are essentially the primary colors -when they are mixed, they produce army drab.