I believe that altcoins are only a tool for speculation. What the real use of they have no. For many altcoins even goods can not be bought while for bitcoin to buy some goods really
I dont think so, theres so many altcoins that have a real value today and its technology is really good. For example the XRP, many banks are already adopting this technology so meaning there is a real use of this coin.
Good altcoins will become important as long as with bitcoin, because this is a cryptomarket and we need more coins to fulfil the emptiness of bitcoin. Altcoins may not overcome bitcoin but its significance will remain in this market as we are continue growing everyday.