Look for new blockchains like NKN, Pchain, Seele, QuarkChain - they can be Etherium's killers and make x100 in near future, DYOR!
Bitcoin is indeed the king of coins but for Altcoin, it also plays an important role in advancing Cryptocurrency market and making it increasing and reliable. this is the potential of Altcoin as a coin that very able to be relied upon and become a coin of pride. so Altcoins like Ripple, Ethereum, and EOS are potential coins to support Cryptocurrency market progress.
today many of Altcoin's are progressing so much. with the development of Altcoin like this is able to bring Altcoin into a reliable coin forward. so it's good enough to have the coin backed up and be the main coin in the future. this includes the Altcoin potential that needs to be developed.