There's more than 12 thrones Searcher. In any event, the 144k are clearly a subset of all other Christians being differentiated in scripture from the rest they are taken out of, since they are taken 'from' each of the twelve tribes. If not all are on thrones, then perhaps all are priests, as a parallel to the Levitical priestly class of ancient Israel.
NIV:
Revelation 3:21
To the one who is victorious, I will give the right to sit with me on my
throne, just as I was victorious and sat down with my Father on his
throne.
Revelation 4:4
Surrounding the throne were twenty-four other thrones, and seated on them were twenty-four elders. They were dressed in white and had crowns of gold on their heads.
Revelation 11:16
And the twenty-four elders, who were seated on their thrones before God, fell on their faces and worshiped God,
Revelation 20:4
I saw thrones on which were seated those who had been given
authority to judge. And I saw the souls of those who had been beheaded
because of their testimony about Jesus and because of the word of God.
They had not worshiped the beast or its image and had not received its
mark on their foreheads or their hands. They came to life and reigned
with Christ a thousand years.