I think Ethereum will keep rising, slightly faster than Bitcoin.
My reasons are that, like the majority of alt coins, the recovery from 2017 has been slower than bitcoin. For me this means there is still a lot of upside to go. Secondly, Ethereum is a solid player in the whole crypto industry and is used by many other tokens. Thus there is a genuine demand for its service and therefore genuine value.
The current market demand and supply does prove ETH to experience some growth in price than Bitcoin but all this happen because of the market correction which Bitcoin market is experiencing and the arbitrage trader switch to altcoin market which is expected since Bitcoin seems to be the only coin gaining surge in price due to institutions accumulation.