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.
for Altcoin which is good enough for investment is a coin that has an ever-increasing development. because with the ever-increasing development is able to generate much larger profits and attract the attention of many other investors to join and support the development of coins such as Ehthereum, Ripple, and Bitcoin Cash.