It will not be easy for ethereum to regain its former glory. Competition is getting stronger and other coins like ripple are in contention for second place. That's why it is hard to say if ethereum will do it.
Everything can happen in cryptocurrencies including ethereum break its highest record, but i don't think Ripple will be competitor of ethereum just due to the capitalization of marketcap Ripple is biggest than ethereum, due to the purpose of Ripple and ethereum is different, ethereum is used for smart contract and decentralize application dapps and Ripple is digital currency especially for the banking businesses ( remittance between banking around the world).