As 2015 draws to a close, the bitcoin mining industry is breathing a collective sigh of relief after what can only be described as a grueling twelve months. The year tested miners like few others, forcing many operations to shutter while the strongest players consolidated their positions for the challenges ahead.
TL;DR
- Bitcoin mining difficulty increased steadily throughout 2015 despite price volatility
- Miners were forced to sell both holdings and newly minted coins to cover operating expenses
- Small and mid-scale operations struggled to remain profitable as margins thinned
- Major infrastructure investments signaled long-term confidence in mining economics
- BitFury raised $20 million in July to build a 100 MW data center for blockchain infrastructure
The Long Winter Takes Its Toll on Mining Operations
The story of bitcoin mining in 2015 is inextricably linked to the price trajectory of the cryptocurrency itself. After peaking near $1,150 in late 2013, bitcoin entered what economist Tuur Demeester, editor-in-chief of Adamant Research, described as a “long winter.” By January 2015, the price had cratered to approximately $200, a decline of over 80 percent from its all-time high.
For miners, this price collapse was devastating. With bitcoin trading at roughly $200, many operations found themselves mining at a loss. Electricity costs, hardware depreciation, and facility expenses remained fixed even as the value of their output plummeted. The math was unforgiving: if it cost more to mine a bitcoin than the coin was worth on the open market, something had to give.
Throughout 2015, miners were forced into a difficult position. Many resorted to selling both their existing bitcoin holdings and newly mined coins simply to cover operating expenses. This selling pressure created a negative feedback loop, suppressing prices further and making mining even less profitable.
Rising Difficulty Compounds the Challenge
Even as the price of bitcoin began its slow recovery through 2015, climbing from roughly $200 in January to approximately $430 by late December, mining difficulty continued its inexorable rise. The network hash rate grew substantially as more efficient hardware came online and larger operations expanded their capacity.
This presented a paradox for smaller miners. The price was recovering, yes, but each individual miner was competing against an increasingly powerful network. The bitcoin reward for mining a block remained fixed at 25 BTC, but the share of that reward available to any given miner was shrinking as total network computing power grew.
The result was a natural consolidation of the mining industry. Operations that could not achieve economies of scale or access cheap electricity were gradually priced out. Chinese mining farms, benefiting from low electricity costs and proximity to hardware manufacturers, gained an increasingly dominant position in the global hash rate distribution.
Big Players Double Down on Infrastructure
While smaller miners struggled, major players in the mining ecosystem were making significant capital investments. In July 2015, BitFury Group, one of the leading bitcoin blockchain infrastructure providers and transaction processing companies, announced it had raised $20 million in a funding round that included DRW Venture Capital, iTech Capital, and the Georgian Co-Investment Fund.
The capital was earmarked for the construction of a massive 100 megawatt data center dedicated to blockchain infrastructure. This investment signaled that despite the challenging market conditions, well-capitalized players saw the downturn as an opportunity to build for the future. The logic was straightforward: by investing in infrastructure during a bear market, these companies would be perfectly positioned to capitalize when prices recovered.
The trend toward industrial-scale mining operations accelerated throughout 2015. Custom ASIC chips became more efficient, cooling systems more sophisticated, and facility designs more optimized. The era of hobbyist miners running rigs in their garages was effectively drawing to a close.
The Green Shoots of Recovery
By December 2015, the picture was beginning to brighten. Bitcoin had staged an impressive recovery, with its price more than doubling from the January lows to trade around $430. This price improvement brought many mining operations back into profitability, though margins remained thin compared to the boom years of 2013.
The broader blockchain ecosystem was also experiencing a surge of institutional interest. Companies like IBM, Nasdaq, and Goldman Sachs had all announced blockchain initiatives during 2015, lending credibility to the underlying technology. For miners, this institutional interest was encouraging because it suggested growing long-term demand for the bitcoin network and its security infrastructure.
Why This Matters
The mining industry of 2015 was a crucible that forged the modern bitcoin mining landscape. The weakest operations were eliminated, the strongest survived and grew, and the stage was set for the massive industrialization of mining that would characterize 2016 and beyond. The investments made during this challenging period — the $20 million funding rounds, the 100 MW data centers, the next-generation ASIC development — would prove prescient as bitcoin embarked on its next major bull run in 2016. For anyone seeking to understand the current state of bitcoin mining, 2015 is where the modern industry truly began.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Past performance is not indicative of future results. Always do your own research before making any investment decisions.
Was running 4 S5s in my garage throughout 2015. Electricity costs ate most of the profits. The real winners were the ones who held the coins they mined.
selling coins at $200 to pay for electricity in 2015… tough times
kwh_counter miners selling at $200 to cover electricity created a feedback loop. constant sell pressure kept price suppressed which made mining less profitable which forced more selling. 2015 was pure attrition
4 S5s in a garage at $200 btc. the electricity vs coin value math was brutal. most miners were underwater for 18+ months
s5_veteran ran 4 S5s too. the whine of those fans still haunts me. sold at 215 to cover electricity, kept 2 coins. paid my rent deposit in 2017 with those 2 coins
s5_veteran ran 8 S3s before the S5s. sold coins at $215 to keep the lights on. the math was genuinely brutal, electricity ate 80% of mined BTC at those prices
s5_veteran ran S5s too. the noise alone was insane. sold most coins at $220 to cover electricity. the few i kept were worth 100x by 2017. painful math
BitFury dropping $20M on a 100MW facility while everyone else was shutting down… thats how you know who actually understood the long game
BitFury building 100MW while others folded. same play as Marathon and Riot in recent years. vertical integration always wins mining
megawatt_ BitFury at 100MW in 2015 was the same thesis as Foundry and Marathon today. economies of scale in mining were obvious even back then. small ops never had a chance
coal_pick_ BitFury building 100MW at $200 BTC while everyone else folded is the same thesis as Marathon buying sites at $16k in 2022. vertical integration always wins eventually
shutoff_switch BitFury spending $20M when BTC was at $200 took real conviction. most people thought the party was over. those who built infrastructure during the winter reaped the rewards
That Tuur Demeester quote about the long winter was spot on. Lived it in Poland, lots of small ops just vanished that year.
BitFury dropping 20M at 200 BTC while Polish miners were literally giving away S3s on local forums. conviction plus capital plus cheap electricity equals 100MW facility. the rest of us were just trying to not lose money
ran S5s at $200 BTC and sold most to pay electricity. kept 3 coins and they paid for my car in 2017. mining discipline mattered more than hardware
s7_nostalgia_ the real lesson from 2015 was survival. the miners who held even a fraction of what they minted made life changing money
BitFury raising 20M for a 100MW facility in July 2015 was the moment mining went industrial. garage rigs were already on life support by then
sichuan_hydro_ BitFury spending 20M at 200 BTC was the ultimate contrarian play. everyone else was shutting down and they were building 100MW
sichuan_hydro_ garage rigs were already dead by mid 2015. the move to industrial scale was obvious to anyone paying attention to difficulty charts. the writing was on the wall
miners selling newly minted coins AND holdings to survive 2015. the exact same thing happened in 2018 and 2022. the cycle never changes, only the hardware gets more efficient
anneli_f miners selling at 200 to survive and the cycle repeating in 2018 and 2022. the only constant in mining is that hardware gets more efficient and margins get thinner
ran S5s at 200 BTC and sold most to cover electricity. kept 2 coins. they paid my rent deposit in 2017. mining discipline was everything
s5_echoes_ the attrition feedback loop was brutal. miners selling at 200 suppressed price which made mining less viable which forced more selling. pure survival mode
s5_echoes_ the attrition loop was savage but at least you kept 2 coins. most miners sold everything and were left with nothing but hardware that couldnt pay for itself
BitFury spending 20M to build 100MW while everyone else shuttered. same play as Marathon loading up at 16k in 2022. vertical integration always wins eventually
Branko T. BitFury spending 20M on 100MW while others shuttered is the same pattern as every cycle. the survivors who build in the trough become the monopolists of the next bull run