Bitcoin is king but ETH certainly can make up ground in the future.
Definitely consider continuing to hold ETH.
Most of the decentralized finance dApps and projects, about 90%, are running on the ethereum blockchain. Defi (lending, staking, analytics, tokenization, oracles, DAO, DEXs) is in its infancy but it will continue to grow and increase ETH's prominence. ETH's future looks bright and will give a higher multiple ROI than Bitcoin.
For an excellent review of DeFi and why ETH will be king in the future, see:
https://www.publish0x.com/cryptocurrency-insights/defi-best-class-2020-xyjxjm(tip the author, he worked hard to compile the info

)
So it is an easy choice, go with ETH = Sleeping giant.