Multi-millionaire ‘biohacker’ Bryan Johnson’s infatuation with staying alive has drawn plenty of interest – resulting in his own Netflix documentary, aptly named ‘Don’t Die: The Man Who Wants to Live Forever’Multi-millionaire ‘biohacker’ Bryan Johnson’s infatuation with staying alive has drawn plenty of interest – resulting in his own Netflix documentary, aptly named ‘Don’t Die: The Man Who Wants to Live Forever’