Christ came so we might have life and have it more abundantly (John 10:10). Some modern preachers want us to believe this refers to wealth and prosperity, so they urge people to go boldly before God and claim this promised abundance. To them, faith is measured by how much God blesses us materially.
However, the God revealed in the Bible is not some big “sugar daddy” in the sky, ready to give us everything we want. We may prayerfully sing, “Oh Lord, won’t you give me a Mercedes Benz?” and we might get it, but that doesn’t mean God gave it to us.