In my opinion, the thing that will make people keep using bitcoin is how easier it is. You can imagine when in the future you wanna do transaction around the world just by using 1 coin, with a low fee and also save. You don't need bank anymore to put your Money, also there is no that you should pay every day. And you can imagine when you go traveling and don't need Money changer anymore. You can do anything just 1 coin.