We all know Judas, or do we? What is striking in these verses is that Judas repents (metamelomai) . He wishes it could be undone. Judas, in a strange way, begins to get it. He even takes back the blood money, but the chief priests and elders will not accept it.
So this blood money is spilled on the Temple floor and Judas hangs himself.
What is the eternal fate of the Betrayer? I cannot definitively say. On the one hand, he betrays the Lord Jesus (“woe to the one…”). On the other hand, he repents.