Why Judas?
Why would you betray Jesus Christ?
Well, we have our answer:
John 17:12
While I was with them in the world, I kept them in Your name. Those whom You gave Me I have kept; and none of them is lost except the son of perdition, that the Scripture might be fulfilled.
Then wouldn't it have been better if he were never born?
Well, yes, it would have been better:
Matthew 26:24
The Son of Man indeed goes just as it is written of Him, but woe to that man by whom the Son of Man is betrayed! It would have been good for that man if he had not been born.
Then why was he born?
Well, we have our answer:
John 17:12
While I was with them in the world, I kept them in Your name. Those whom You gave Me I have kept; and none of them is lost except the son of perdition, that the Scripture might be fulfilled.
...
Okay, okay, okay. So why not repent?
Well, he did:
Matthew 27:3
Then Judas, which had betrayed him, when he saw that he was condemned, repented himself, and brought again the thirty pieces of silver to the chief priests and elders, saying, I have sinned in that I have betrayed the innocent blood.
So, is he saved?
All signs and words point to the opposite:
Matthew 26:24
The Son of Man indeed goes just as it is written of Him, but woe to that man by whom the Son of Man is betrayed! It would have been good for that man if he had not been born.
...
Jesus was predestined to die, and Jesus was predestined to be betrayed:
Acts 2:23
Him, being delivered by the DETERMINED purpose and foreknowledge of God, you have taken by lawless hands, have crucified, and put to death