Are Unicorns real?

Most people dont believe in unicorns just because there has been no proof of their existence. I think that there is no harm in believing in something that may not exist. My theory and thought behind this is simple. My theory is horses today are just evolved forms of unicorns. And with time they lost those genetics and evolved in what me and u know today as a horse. So think about it and you might find out that my theory just might be right

People choose what to believe is real I don't personally think they are real, but I do belive other things. Such as monsters within cards.