There is no harm taking a small punt on a number of coins: Ether, Bitcoincash, Doge, Monero, Dash.
Do your research and try not to pay too much. Have a set point where you start to cash out profits. Pretty soon you'll have made yourself some more bitcoin.
I think all these coins are OK. But bitcoin cash could also be a good back if the Segwit version of the bitcoin fails.