Yes, without any second thought bitcoin is the future but to say that bitcoin is the only future and it cant be replaced by any other cryptocurrency is wrong. the latter statement means that there will be no further progress in the field of blockchain or cryptocurrency. If it is so then it means that the technological field has become stagnant which is wrong. because i believe that the room at the top is always vacant i.e there is always a room for improvement. Afterall we have progressed thousands of miles from stone age when man used to live in caves. so bitcoin is not the only future and can be replaced, the very thought of replacement seems absurd at the moment but who knows what the future has in store for us.