Bitcoin will always have its place in the cryptoworld but its dominance is going to be replaced soon. Ethereum is currently the top contender but if not that then next year something else will probably rise up.
I haven't been here long, but from my research, I don't see bitcoin being replaced because of how long it took to get to this point. There might be other alt coins that reach the same price. And maybe in time they will have as many transaction as bitcoin. But bitcoin is the oldest and I think people will always respect that.