Not seldom we ask and dream thing that we couldn't cope, but think very hard to have them. In English, it is called as 'well-intentioned dream' and in my motherland's tongue, we call it 'angan-angan mat jenin'. Dreams are only dreams for two reasons: we don't strive to achieve them, or they're too good to be true.
Dreaming has never been a crime. Everyone has the right to set their aim(s), to go for their dream(s) and to achieve their sky-high aspiration(s). But we should always adhere to the consciousness of our own act and respecting our limitations. Don't do crime upon ourselves.