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.
the development is not only happening to Bitcoin alone because Altcoin too has the potential to continue to grow and so the benefits for Altcoin and Bitcoin in terms of price can also be helped to increase. so it would be very advantageous to have a potentially high earning coin in the future.