Coaxial cable is considered by most an old-school transmission media. Coaxial cable has served the CCTV industry very well for the majority of its current technological lifetime. But the future of physical cables is fiber optics. Fiber optics has thousands of times the bandwidth of copper wire and carry signals hundreds of times further before needing a repeater.
Remember, the success of any surveillance system is only as good as its lifeline, may it be coax or fiber optics. Choose the one the fits your budget and security solution.