All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.
There is nothing wrong in reading the Quran and asking Allah with it, as the following was reported in a hadeeth, “Whoever recites the Quran, let him supplicate Allah with it.” [At-Tirmithi]
There is nothing wrong with reading Ruqyah (healing through Quranic recitation or supplication) on water for a patient to drink it; this Ruqyah consists of the person reciting verses of the Quran, Thikr (expressions of remembrance of Allah) and supplications, and then blowing in this water.
Ibn Muflih said, “Saalih ibn Imaam Ahmad said, 'There were times when I got sick, and my father would take a bowl of water, recite the Quran over it, and then he would tell me: Drink it, and wash your face and hands with it.'”
As regards drinking water on which the Quran was recited and believing that you might become rich or knowledgeable because of this, then we are not aware of any evidence for it, and we have not come across any scholar who spoke about it.
Allah knows best.