Does it make sense to believe that Bitcoin could one day be replaced by another cryptocurrency, that is, a cryptocurrency that really does make Bitcoin obsolete?
Not believing that Bitcoin cannot replace by another crypto is becoming not open to the possibility that an upgraded and improved alt will arise. A lot of alts are still making to make sustain the needs of the people in different aspects and somehow to be in line or maybe beat Bitcoin from its popularity. No one can predict this but we shouldn't close it for the possibilities.
Whatever happens, still, Bitcoin is already benefit from us an vice versa and serves as a part of the cryptocurrency history.