Ethereum. I considered it briefly, an RX 480 (or similar) will yield about $150US/month for 24/7 mining. It would take 3+ months to break even on the investment, plus the electricity usage as an ongoing expense, and then just hope that the electricity rates do not go up any more than they have in the last year and that the Ether market remains stable. Too much of a gamble, but I'd still like to to try it out with a less powerful card, just to see what it's all about.