Five years from now, one of the obstacle that bitcoin might face is the rise of more cryptocurrency with the same concept of bitcoin that promise more advantages .  As bitcoin becomes popular, rise of competitor is possible.  Bitcoin become more authoritative place in the world of currency system if the people behind this will keep on updating the value, benefits and functions of bitcoin that it may offer to the world.  With that, even the world will try to imitate or create the same concept as bitcoin, People will still patronize  the Bitcoin.