Ether is an altcoin but if you prefer something else then I suggest you to see coinmarketcap.com for the listing of thousands of altcoins there. And if I were you I will going to choose on crypto that are listed on top rank of course you can see there that ether is next to bitcoin. But, there could be more better than ether in terms of its market price volatility if you do like to do trading. Just do your research before putting up your money.