Who says miners are losing money? Any proof of that? Once they've bought their ASICs, electricity's cost is very low. They are making less money, that's right, but there's no sign any miner is actually losing money from its daily operation.
Because of the low BTC price and high difficulty, most miners spend at least half of their revenue on electricity.
The most efficient miners on the market are ~.5W/GH, so a 1 TH/s miner would use ~500W and earn ~$60/month at current difficulty and a BTC price of ~$180.
That .5W/GH miner would still use ~$37 (@10 cents/kwh) in electricity per month to earn $60.
Most miners are not running the most efficient hardware on the market, and many have costs that exceed 10 cents/kwh.
I have no doubt that a very high percentage of the mining market is in the red right now (probably between 25-50% of the network hashrate).
The economics of mining are terrible right now, so either miners will quit and the difficulty will go down (as it should given the low BTC price), or the price of bitcoin needs to go up.
Note: I ran a 30TH mining farm between April and August of this year, so I know what I'm talking about...
So you stopped mining when
BTC fell below $500? Quite surprising. Especially considering that you made quite an investment to get 30TH.
My mining experience is very limited. I tried it in early 2013, with my own home computer, which wasn't up to the task, so I stopped quickly. Now, there's a difference between not making any money, and actually losing money. How long's the return on investment when buying an ASIC? After that tipping point, the only cost is electricity, and
BTC's price is still above that, I believe.