There are no reasons, truly. It has the opinions of one man, delivered as the word of Allah (TMM). There is much more of interest to read in the Bible. But you should "Treat both imposters, the same".
They say that "If you want to know Islam then read Qur'an, don't judge Islam by its followers". So if you want to learn more about Islam then you should read Qur'an.
It's been years after years but not even a single verse of Qur'an has been changed, it's still the way it was revealed.
Qur'an has already said many facts hundred years ago which are now being discovered by science.
There are many such reasons.
Recite QURAN KAREEM .