Technically, IT will not Destroy the World, It has a 0% Possibility of it CREATING a blackhole, Check the CERN site, Plus. Research more, The first test is already done, And yeah, it went fine, Even if it creates a Blackhole it will be Microscopic and Dissapear Before a NANOSECOND.
A nanosecond is just unbelieveible... Dont worry about it, It's secure and safe.