If you can best is both. Stacking cardano and mining ETH or something else. With price going up probably for most alt you cant be wrong at the moment.
Mining ethereum not worth anymore for the small miners and if you have not yet tried it and just try that now. It's better to staking the coins rather than try to mine crypto. You didn't need to think about the electricity cost and the block reward that can decrease anytime.
I personally will never try to pick the mining again as it's already outdated.