Although there are a lot of altcoin arising even with more updated features than bitcoin, bitcoin still remain the strongest because bitcoin already has the trust of people who strongly believe what bitcoin can do and I think that's the reason why bitcoin survived a decade.
in bitcoin it all started so it is impossible to be surpassed by other altcoins as long as bitcoin continues to exist it will not disappear but it is also possible because there are other alt coins popular and used by people