I thins we still have to hold some in BTC. Jst remember what happens last time it's start pumping. Also have EOS and Cardano. Think they could do something especial, may be even its will be etherium killer in some years
Besides BTC, I like EOS, NEO and some other blockchain companies like QTUM maybe. But none of them are pormising like ETH. We can also say Waves for the promising ones in addition to ETH.