There were a possibilities of blackmails

Jobs got some good trips.

According to Wired Steve Jobs thought someone might kidnap his daughter in order to blackmail him, according to a newly released Department of Defense document that was filled out in the 1980s when Jobs underwent a background check for a Top Secret security clearance.
According to a newly released Department of Defense document he expanded the awareness with the acid.
He was a genius.
It is dangerous to imagine that a man who has no any substance to be taken up under the mind´s surface, could benefit by taking the trips.

The Department of Defense documents released to Wired don’t indicate why Jobs was being given a Top Secret security clearance, but according to Walter Isaacson’s biography of Jobs, the Pixar clearance was required because of contracts Pixar signed with intelligence agencies to use its Pixar Image Computer for rendering information from reconnaissance flights and satellites.