Bitcoin will transform into a completely different animal over the next 10 years...
I keep hearing people say that this coin and that coin is going to replace Bitcoin. Their reason's vary from this coin is faster or that coin is more secure or this coin does this and Bitcoin doesn't. Segwit has been activated today and it has been proven to the world that the Bitcoin software can be updated.
Bitcoin is the first cryptocurrency every created and it is the face and brand of cryptocurrencies... loved and recognized by all. There is no doubt that the Bitcoin software will be updated many more times over the next 10 years. It will become faster, it will become more secure, it will no doubt have many additional features. This is the reason why Bitcoin isn't going to be replaced by any other coin. It will become the best, and will remain first and most loved crypto... just to clear up a little confusion :D