Yes we need altcoins but we do not need more then we already have i think we have like 1200 coins in total and nobody follows them all everyone follows the most popular ones and they only try to follow one if they see how much they can make.
Yes we need Altcoin. Altcoin are as much as important then that of bitcoin. Some Altcoin are more advance then that of bitcoin and some of them are more profitable then that of bitcoin in some serious circumstances. Altcoin like Ethereum is good for long term investment purposes because it less volatile nature then that of bitcoin. Which help many investor in their investment. Litecoin is providing better block size. And this block size of litecoin help it in its speed transcription matter. And make it best cryptocurrency for transaction. Ripple is a most advance crypto which is not just a simple cryptocurrency it also help in developing of apps too.