another decentralised currency will rule the world. Bitcoin is the first real decentralised currency but its not perfect and will be replaced at some point (but not in the near future)
Why does everyone think that BTC wont change with time? Every "doomsday" prophecy doe the same thing...they all think that BTC wll stay the way it is right now and will never ever change (chain will get too long, speed of transaction bla bla bla bla...it's like BTC will be frozen in time). Same here..it is not perfect and it will die....do you think that BTC will never be upgraded, fixed, changed?