Ethereum is already not available for mining after they change there algorithm to PoS. You can only earn Ethereum through staking or become a validator. There is no answer to your question but if you are assuming that ETH will goes back to PoW in the future then the answer is yes because miners will keep coming on ETH since it’s the second largest blockchain in crypto space next to Bitcoin. The future of this token is guaranteed success. Everyone is watching this coin so this tcoin will be profitable as always.