If you want to mine ETH to cash out in to fiat and are in the US, you can use a GDAX (owned by Coinbase) ETH wallet address, trade the ETH to BTC, transfer the BTC to Coinbase for free and then sell the BTC for USD and transfer it to your bank account for a fee or get a Shift debit Visa card connected to your Coinbase wallet to spend the BTC with no fees.
GDAX has an ETH->USD exchange - why not just use that and skip the BTC middleman?