Hey Guys, I was wondering if it would be worth it to buy an R4 and start mining. My power bill is about .10/kWh and according to nicehash.com I would be making about $2000 at the current rate.How accurate are these calculators and if it is worth it, where can I get an R4 since they don’t seem to be in stock on bitmain.com? via /r/BitcoinMining http://bit.ly/2q1J12d