The Hardware/Software Landscape
As August 2018 unfolds, the Bitcoin mining ecosystem finds itself at a fascinating crossroads. With BTC hovering just above $7,000 — a far cry from the near-$20,000 highs of December 2017 — miners around the world are recalibrating their operations to survive what many are calling the most challenging market conditions since the pre-bull era of early 2017. The hardware landscape is dominated by Bitmain’s Antminer S9, which remains the workhorse of Bitcoin mining, while newer models like the Ebit E10 and Halong Mining’s DragonMint are slowly entering the fray. Mining farms in China, particularly in Sichuan and Xinjiang provinces, continue to leverage cheap hydroelectric and coal-powered electricity, though the ongoing trade tensions and regulatory uncertainty are causing some operators to explore jurisdictions like Iceland, Canada, and Paraguay. Meanwhile, software optimizations are becoming increasingly critical as miners squeeze every last satoshi of efficiency from aging hardware.
Hashrate and Difficulty
Despite the dramatic price correction from December 2017’s all-time highs, Bitcoin’s network hashrate has continued its upward trajectory through the summer of 2018. The network is producing approximately 40-45 exahashes per second, a testament to the ongoing deployment of new mining equipment even as profitability narrows. Mining difficulty adjustments have been consistently trending upward, with the network recording some of its largest single-epoch increases during this period. This divergence between price and hashrate is creating a squeeze: more computational power is competing for block rewards while the dollar value of those rewards has plummeted. For miners operating on thin margins — particularly those paying commercial electricity rates above $0.08 per kWh — each difficulty increase is eating further into already-compressed profitability. The difficulty adjustment mechanism, one of Bitcoin’s most elegant design features, ensures that blocks continue to be found roughly every ten minutes regardless of how much or how little hashpower joins or leaves the network. But the lag between hashrate increases and difficulty adjustments means miners who expanded aggressively during the bull run are now feeling the pain acutely.
Profitability Metrics
At current prices near $7,068, Bitcoin mining profitability has compressed significantly compared to the heady days of late 2017. An Antminer S9 operating at 14 TH/s consumes roughly 1,375 watts of power. At an electricity cost of $0.06 per kWh — the rate many large Chinese operations enjoy — daily revenue per S9 is approximately $1.50, with electricity costs around $1.98, meaning many miners are actually operating at a net loss on a day-to-day basis. The breakeven price for efficient operations is estimated to be in the $5,000-$6,000 range, depending on electricity costs and operational overhead. Larger operations with access to sub-$0.04 electricity are still marginally profitable, but the margin is razor-thin. This dynamic is triggering a natural selection process in the mining industry: well-capitalized operations with access to cheap power and the latest hardware are surviving and even expanding, while smaller, less efficient miners are being forced to either upgrade their equipment or shut down entirely. The block reward of 12.5 BTC — worth roughly $88,000 at current prices — plus transaction fees must cover the massive capital expenditure of ASIC hardware, cooling systems, and facility costs. Many miners who purchased equipment at premium prices during the bull run are now sitting on depreciating assets that may never generate the returns they projected.
Environmental Impact
The environmental conversation around Bitcoin mining has intensified as the network’s energy consumption continues to climb. Research published in August 2018 by economist Alex de Vries estimates that the Bitcoin network consumes approximately 63 megatons of CO2 annually, roughly equivalent to the carbon footprint of a small country. The total energy draw is estimated at around 70-75 TWh per year, comparable to the entire electricity consumption of Austria or Colombia. However, these estimates remain controversial, with proponents arguing that a significant portion of mining leverages renewable energy sources — particularly hydroelectric power in Sichuan during the rainy season. The debate has taken on new urgency as institutional interest in Bitcoin grows, with companies like Argo Blockchain, which just debuted on the London Stock Exchange on August 3, positioning themselves as transparent, publicly-traded mining operations that can be held accountable for their environmental footprint. Argo raised approximately £25 million in its listing, signaling that traditional financial markets are beginning to recognize cryptocurrency mining as a legitimate industrial sector. Critics, however, argue that the proof-of-work consensus mechanism is fundamentally unsustainable at scale, and point to alternatives like proof-of-stake as more environmentally friendly solutions.
Strategic Outlook
The announcement by Intercontinental Exchange — the parent company of the New York Stock Exchange — of a new platform called Bakkt represents a potential seismic shift for the mining industry. Bakkt plans to offer physically-settled Bitcoin futures contracts, meaning actual BTC will change hands at settlement rather than cash equivalents. This is fundamentally different from the cash-settled futures offered by CME and CBOE, and could create sustained buying pressure on the spot market. For miners, this development is significant for several reasons. First, physically-settled futures provide a more robust hedging mechanism, allowing miners to lock in future selling prices with contracts that directly correspond to Bitcoin deliveries. Second, the involvement of institutional heavyweights like Microsoft, BCG, and Starbucks through Bakkt signals a maturation of the market that could stabilize prices at higher levels — a direct benefit to mining profitability. Third, regulated custody solutions that Bakkt is building will create the infrastructure for larger institutional positions, potentially driving demand that outpaces the 1,800 BTC daily supply from mining. In the short term, miners face continued pressure as BTC tests the psychologically important $7,000 level. A break below could trigger a cascade of inefficient miners shutting down, which would ultimately lead to a difficulty decrease and improved conditions for survivors. The long-term picture, however, is increasingly bullish: institutional infrastructure is being built, hash rate continues to grow, and the next halving event in 2020 will reduce the daily supply to just 900 BTC — a supply shock that many analysts believe will drive significant price appreciation. Miners who can weather the current storm and maintain operations through late 2018 and 2019 will be well-positioned to capitalize on the next cycle.
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency mining involves significant risk and capital expenditure. Always conduct thorough research before making mining investment decisions.
Bakkt launched physically settled futures at 7k BTC and volume was embarrassingly thin for a year. ICE had infrastructure but institutional demand didnt exist yet
S9s drawing 1300W each while BTC sat at $7k. every farmer I knew was doing mental math on electricity costs daily
thermaldelta S9 era was brutal but the Iceland migration made sense. geothermal at 4-5 cents kWh vs Sichuan hydro that kept getting politicized
Antminer S9s mining at 7k with 5 cent power was break even at best. everyone who held those coins through 2019 came out way ahead though
Antminer S9 was already marginal at 7000 BTC. electricity costs above 5 cents meant you were mining at a loss. the Bakkt news didnt help miners one bit
s9_graveyard_ running S9s at $7k BTC with 5 cent electricity was basically mining at a loss and hoping for a bull run. everyone who held those coins through 2019-2020 made life changing money though
Bakkt was supposed to be the institutional on-ramp. physically settled futures sounded revolutionary. took them another year to actually launch and by then the narrative had moved on
ICE launching physically settled futures was supposed to bring institutional volume. instead Bakkt had the lowest volume launch in futures history and BTC kept dumping for 6 more months
Gustav N. Bakkt’s physically settled futures were supposed to bring institutions. instead volume was embarrassingly thin for the first year. ICE had the infrastructure but the demand just wasnt there at $7k BTC
BTC at $7k and hashrate still climbing. if that doesnt tell you miners believe long term nothing will
kilowatt_kat BTC at 7k with climbing hashrate in aug 2018. miners kept expanding even when margins were razor thin. the long term conviction was always there
ran S9s through the entire 2018 bear market. those machines were tanks. barely profitable but they kept hashing
ran my S9 until the fans died. replaced them twice. that machine survived 3 bear markets. they do not make them like that anymore
s9_lifer those machines were indestructible. ran three of them through 2018-2020 and they outlived two fan replacements and a power supply
We moved our farm from China to Iceland that summer. Geothermal energy was a game changer for cooling costs.
IcelandMiningCo geothermal cooling is underrated. ambient temp of 5C year round plus renewable energy is basically a mining cheat code. sad iceland cracked down on new farms
IcelandMiningCo geothermal plus 5C ambient year round is the dream setup. sad iceland started capping new mining operations
ICE announcing Bakkt with physically settled futures while BTC was at 7k. that was the first real institutional on ramp and nobody appreciated it at the time
Omar F. bakkt was the first real institutional onramp and nobody cared because btc was crashing. ICE had the right idea 2 years too early
Bakkt was supposed to be the institution on ramp and it basically flopped. ICE had the right idea but the timing and execution were off. futures volume was weak for years
Jana V. bakkt flopped because they launched right as the 2018 bear kicked in. physically settled futures were the right product 2 years too early
Konrad W. bakkt was two years early but also the execution was rough. physically settled futures needed institutional demand that didnt exist in 2018
antminer s9 mining btc at 7k in august 2018 with electricity under 5 cents was barely break even. those who held the coins mined the most profitable batch of their lives
Antminer S9s hashing through 2018 at 7k BTC. those machines were built different. replaced fans twice and they just kept going
Bakkt launching physically settled futures at 7k was actually visionary. execution was rough but the thesis was 2 years ahead of everyone else