Very related, between altcoin and bitcoin, and the way the cryptocurrency ecosystem grows, both need these two elements... altcoin is present as a complement, where when altcoin is not present in the Bitcoin ecosystem it really won't be able to have this much trading volume.. meaning Bitcoin is not as famous as this... the media influence will be a little less interesting because the community is not as big as it is now if altcoin is not present.
I appreciate Bitcoin as an initiator, and I also appreciate altcoin as a successor. With the presence of bitcoin and altcoin, cryptocurrency becomes more adoptable by more people.