In my own personal opinion yes we do really need altcoins but not as much as we already have now in the market. Actually as I use the blockfolio to keep track of my holdings, as soon as you input the ticker to make a list of you new token you will see there that it says on the top as you add the token 'search over 8000 coins', meaning there are too much cryptocurrency that are truly existing. I don't think we need that much coins and tokens. A hundreds kinds of cryptos will still be good enough I think but 8000 kinds is too much, most of them are useless shitcoins. 😐