As the sibling comments are pointing out, yes, it actually was seriously considered for a while. Even today there are people like Roger Penrose who believe ther

As the sibling comments are pointing out, yes, it actually was seriously considered for a while. Even today there are people like Roger Penrose who believe there is some link between consciousness and the measurement problem. Even more, there are many interpretations of QM where the classical world is only an illusion of the observer essentially.