I'm thinking about building a 6 or 7 RX480 machine to mine ETH but I'd like to have a fallback altcoin if ETH tanks. From what I've seen, LTC, XMR and Zcash aren't even profitable unless I'm doing the calculations wrong. I only pay about .7 kwh so my electric is on the lower end of the spectrum.

Any advice would be great, really want to get into mining but want to be smart about it. Thanks!!

Jon