it can be replaced with ETH or bitcoin cash. I know bitcoin is the number one currency and mother of all alt coins but we should not forget second and third coins which are Eth and bitcoin cash. Both currencies have the huge stamina and they're increasing more than bitcoin since BTC is losing its price I don't have any idea why it dumping but if you look at eth and bitcoin cash they're going up if the things happen of 1 year I can bitcoin not only replace but it can vanish.