This is sure going to be ome insane diff spikes in the coming months ahead with the new 7TH miners coming out will be a tough call to produce some RIO on equipment. Bye bye the old days of having 60GH and then 200GH to make 1 BTC a day. To make BTC a day now you need aprox 110TH compared to 2013 and 2014 is a massive spike to push the home user to generate anywhere near that you need own co-location for that sort amount of power. Would need at least 15 of the new 7TH units without any diff jumps to be in with a chance. With 7TH now your able to maybe brake 2BTC a month or just under with diff changes every few weeks. Wonder what the price in BTC is going to be for the units and with the current price of BTC is going to also be interesting too.
There weren't as many people mining back then as there are now, miners fly off the shelves, new users are mining every day and there is still only 25 coins a block to go around.
Might be more miners but more corporate company's dominate in buying up everything and making us home miners get nothing in return like good old days. They was many miners around then as their is today just more people mine on different coins now. Even with more hash coming out per unit and being a good price will indeed attract more people to the mining filed without first adding up all the facts first.
Anyway mining is done for unless your in the race and have enough to make good or theirs no point buying a few units as will never pay off. Best investment now days is, buying coin, holding them and riding the waves, than to put into equipment that is going to be a paper weight in a few months time, even if it brakes even the cost is shocking at almost 10BTC for 1 7.7TH unit kicking 3436W of energy per unit. RIO will take to break even: 273.83 Day(s) and that is based of current market price and if it was to go up in price no doubt the RIO time will come down but still too much risk for little return. If market was close to $300 a bitcoin then you would look to 189 days for RIO but that has got some serious work to get it back anywhere near what it was.