Which Cryptocurrency Is Worth Mining This Month?

Bitcoin Mining Economics in Q3 2026

1. Bitcoin’s price surged to $86,000 on September 21, lifting daily mining revenue per petahash to $27.70 — the highest since April 2026.

2. Despite the rally, the weighted average pre-tax cash cost for listed miners stood at $75,500 per BTC in Q2 2026, indicating razor-thin margins for most operators.

3. Hashrate declined for six consecutive months — the first such streak since China’s 2021 mining ban — reflecting structural exits rather than cyclical pauses.

4. Miner profitability remains highly sensitive to electricity rates; facilities with sub-$0.03/kWh access achieved positive net cash flow even at $78,000 BTC, while those above $0.055/kWh remained unprofitable.

5. The network difficulty adjustment on September 18 increased by 2.1%, confirming continued attrition among marginal hashpower providers.

Altcoin Mining Viability Landscape

1. Ethereum Classic (ETC) posted a 42% hashrate increase over the past 30 days, driven by renewed ASIC deployment following its August hard fork that reduced block reward variance.

2. Kaspa (KAS) mining profitability spiked after its v20.0 upgrade lowered submission latency and improved block propagation efficiency, raising effective hashrate utilization by 18%.

3. Monero (XMR) maintained consistent miner interest due to its resistance to centralized hardware, with CPU-based pools reporting stable ~$0.14 per kilo-hash/day returns amid rising privacy demand.

4. Ergo (ERG) saw a 31% uptick in GPU-mined blocks after integrating Sigma protocols into core consensus, enabling verifiable zero-knowledge proofs without sacrificing throughput.

5. Ravencoin (RVN) experienced declining returns as its algorithm shifted toward ASIC dominance, pushing out legacy GPU miners and compressing margins below $0.02 per MH/s/day.

Hashrate Migration Patterns

1. Over 12 EH/s of decommissioned Bitcoin mining capacity was repurposed for AI inference workloads during Q2, with Bitdeer and Riot redirecting 40% of their idle rigs to HPC clusters.

2. Keel’s complete shutdown freed approximately 2.3 EH/s of Bitmain S21 units, now being auctioned on secondary markets with bidding starting at $19,800 per unit — 63% below original MSRP.

3. IREN’s exit plan included leasing its 110 MW Texas facility to a hyperscaler under a 10-year PPA, effectively converting mining infrastructure into colocation assets.

4. Core Scientific’s $41.9 million cancellation fee for Proto orders signaled irreversible capital reallocation away from BTC-specific hardware development.

5. Hive Blockchain reported commissioning two new GPU farms in Quebec, explicitly citing “multi-algorithm flexibility” as justification — supporting KAS, ERG, and ETC simultaneously.

ETF-Driven Liquidity Effects

1. U.S. spot Bitcoin ETFs recorded $9.99 billion in net inflows on September 21 alone, with IBIT contributing $3.81 billion — the largest single-day inflow since inception.

2. Institutional accumulation via ETFs reduced circulating supply available for short-term trading, tightening bid-side depth and amplifying volatility during minor sell-side pressure.

3. Coinbase Prime reported a 27% rise in custody requests for mining rewards, indicating growing preference for off-chain settlement over on-chain staking or reinvestment.

4. Grayscale’s GBTC discount narrowed to -1.2% on September 22, the tightest level since January, reflecting diminished arbitrage opportunity and stronger underlying demand.

5. ETF-related flows accounted for 68% of total BTC volume across major U.S. exchanges during the week ending September 25, dwarfing peer-to-peer and OTC activity.

Frequently Asked Questions

Q: Is it still profitable to mine Bitcoin with older-generation ASICs like the Antminer S19 Pro?At current network difficulty and $86,000 BTC, an S19 Pro operating at $0.045/kWh achieves ~$0.0012 per TH/s/day net margin — barely above operational breakeven.

Q: Why did Ethereum Classic’s hashrate jump despite no major protocol upgrades beyond August?Miners migrated from ETHW and RAVEN due to improved pool payout stability and lower orphan rates post-fork, not technical innovation.

Q: Do GPU miners need to switch algorithms monthly to stay competitive?No. Algorithms like Autolykos (ERG) and RandomX (XMR) remain resistant to ASIC encroachment, offering multi-year hardware relevance.

Q: What is the current status of Bitcoin halving countdown infrastructure?The 61% completion metric reflects block height progression only; no code changes or network events are scheduled until April 2028.