“Then He took the twelve, and said unto them, ‘Behold, we go up to Jerusalem, and all things that are written by the prophets concerning the Son of Man shall be accomplished. For He shall be delivered unto the Gentiles, and shall be mocked, and spitefully entreated, and spitted on: and they shall scourge Him, and put Him to death: and the third day He shall rise again.’
And they understood none of these things: and this saying was hid from them, neither knew they the things which were spoken.”  Luke 18:31-34  (KJB)

One of the great things we can learn in the gospels is that Jesus the Son of God, the Son of Man; who is God the Son; had a great admiration, love, for the prophets, and desired to see that those prophecies concerning Himself were fulfilled.

Even after His resurrection He spoke with two on the road to Emmaus about believing the words of the prophets (Luke 24:25-26).  Consider Isaiah 53 as an example of the prophecy of His death, and our salvatiion.

Jesus speaks of His impending suffering, crucifixion, and death; and the disciples do not know what He is speaking about.  They were still dreaming of living in splendor, authority, and power reigning with Him on earth.

Why should the Christian of 2019 read the writings of the Prophets?  As a matter of fact why should we read the whole Old Testament?  My answer to both of those questions is “Because they are the only Bible Jesus had to read, and know; as well as the apostles.”  Those Scriptures are the ones that testify of Jesus.  That is why.