The binding of Satan is so the world and all the host of heaven will be shown the difference between the world with Satan as it’s god, and the world with Jesus ruling it. This lesson goes on for a thousand years.
The two occur concurrently (at the same time).
I think rather that it has everything to do with the fact that God made Adam to have dominion under God's authroity in God's earth. But right now the god of this world is still Satan.
Psalm 8
3 When I look at Your heavens, the work of Your fingers, the moon and the stars which You have established;
4 what is man that You are mindful of him, and the son of man, that You visit him?
5 For You have made him a little lower than the angels, and have crowned him with glory and honor.
6 You made him rule over the works of Your hands; You have put all things under his feet:
7 all sheep and oxen, yes, and the beasts of the field;
8 the birds of the heavens, and the fish of the sea, and all that pass through the paths of the seas.
Genesis 1
26 And God said, Let Us make man in Our image, after our likeness. And let them have dominion over the fish of the sea, and over the fowl of the heavens, and over the cattle, and over all the earth, and over all the creepers creeping on the earth.
27 And God created man in His image; in the image of God He created him. He created them male and female.
28 And God blessed them. And God said to them, Be fruitful, and multiply and fill the earth, and subdue it. And have dominion over the fish of the sea and over the fowl of the heavens, and all animals that move upon the earth.
Those who follow the rebellion after they have seen what the world looks like after a thousand years of Christ's reign on the earth, unhindered by Satan, will receive this penalty:
John 3
17 For God did not send His Son into the world to condemn the world, but so that the world might be saved through Him.
18 He who believes on Him is not condemned,
but he who does not believe is condemned already, because he has not believed in the name of the only-begotten Son of God.
Revelation 20
12 And I saw the dead, the small and the great, stand before God. And the books were opened, and another book was opened, which is the Book of Life. And the dead were judged out of those things which were written in the books, according to their works.
13 And the sea gave up the dead in it. And death and hell delivered up the dead in them. And each one of them was judged according to their works.
14 And death and hell were cast into the Lake of Fire. This is the second death.
15 And if anyone was not found having been written in the Book of Life, he was cast into the Lake of Fire.
That sentence has already been decreed, because the world has already been judged and found guilty:
John 12
31 Now is the judgment of this world. Now shall the prince of this world be cast out.
32 And I, if I am lifted up from the earth, I will draw all to Myself.
Revelation 12
9 And the great dragon was cast out, the old serpent called Devil, and Satan, who deceives the whole world. He was cast out into the earth, and his angels were cast out with him.