I believe that the fear of the unknown should be noticed and we should be afraid but i believe that we should not be worried about the fear of the unknown.

The Fear of the unknown can be very  scary because you can not expect the unknown. As human beings we are afraid of the unknown because those are the substitutes of things that we could not see therefore we are afraid what might could happen.

“The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown”
― H.P. Lovecraft, Supernatural Horror in Literature