When Ethereum came out, it was looked down upon because the market hadnt matured yet. No one understood much about cryptos beyond the peer to peer transfer. When the difference between Bitcoin and Ethereum was established, that is when we had a surge of the altcoin rush. This caused prices to skyrocket on all altcoins. It seems as if the roles have been reversed and there is more doubt on Bitcoin than anything else. This is why we recommend you hodl Ethereum over Bitcoin.
Source :
https://usethebitcoin.com/will-ethereum-better-investment-bitcoin-2018/I think it is possible that ethereum will be better investment then bitcoin but I think in the long run the Bitcoin will be the the most powerful.
But now when can know what will be in these market