Bitcoin Halving Approaching: Deep Dive into Miner Sell-off History and Hashrate Structure

1. Historical Halving Patterns and Miner Behavior Review

Bitcoin halving is a deflationary mechanism embedded in its code, reducing block rewards by half every 210,000 blocks. Three halvings have occurred, each profoundly impacting miner profitability and market supply-demand dynamics. Historically: before the first halving in 2012, miners engaged in net selling for months, as the reward drop forced high-cost miners to shut down, with remaining miners selling inventory to sustain operations; before the 2016 halving, hashrate briefly lagged price, increasing miners' willingness to hold; before the 2020 halving, driven by expectations of global liquidity easing, miners mostly chose to hold coins for price appreciation. Notably, none of the three halvings triggered a market-shaking sell-off; instead, they catalyzed massive bull markets 12 to 18 months post-halving. This rhythm of "pre-halving sell-off, post-halving surge" fundamentally stems from the mismatch between supply halving and delayed demand release.

On-chain data from indicators like Glassnode tracking miner wallets shows that historically, three months before a halving, net transfers to exchanges increased by about 15%–20% on average compared to normal periods, but did not cause price crashes. Miner selling appears more as "orderly inventory reduction" than panic exodus. Key reason: miners' capital structure is increasingly institutionalized, with more mature hedging strategies for long-term holdings.

2. Drivers of Miner Selling: Costs, Financing, and Game Theory

2.1 Electricity Costs and Equipment Upgrade Pressure

The largest fixed cost for miners is electricity. Post-halving, the production cost per BTC theoretically doubles; if BTC price does not rise accordingly, miners below marginal cost will be eliminated. Thus, before halving, miners tend to sell some Bitcoin to reserve cash for upgrading mining rigs or paying electricity bills. According to estimates from pools like F2Pool, the average breakeven point for current mainstream miners (e.g., Antminer S19 series) is around $30,000 per BTC, rising to about $60,000 after halving. This psychological price level becomes a key reference for miner selling.

2.2 Financing Structures and Pledged Positions

In recent years, more miners have obtained funding through Bitcoin-backed loans or stock issuance (e.g., Marathon Digital, Riot Blockchain). Such liabilities require miners to maintain a certain level of liquidity. US stock mining companies' quarterly reports often disclose "selling some Bitcoin to repay debt." Under halving expectations, miners tend to realize gains early to lock in profits and reduce leverage risk. According to The Block data, net inflows to exchanges from miners hit a near two-year high in Q4 2023, suggesting some miners were already positioning ahead.

2.3 Game Theory: Miners vs. Speculators

Miner selling itself is a market signal. As halving approaches, speculators often expect increased selling pressure and short, while miners may exploit this expectation by buying back or accumulating during price dips. This game means net miner selling does not simply correlate negatively with price. In the last month before the 2020 halving, net miner selling actually decreased, and BTC price steadily rose from around $7,000 to $10,000, indicating market absorption of selling.

3. Current Hashrate Market Structure: Centralization and Institutionalization

The hashrate landscape before the 2024 halving differs from any historical period. The biggest change is the high concentration of hashrate among North American listed mining companies and large mining pools. As of early 2024, the top three pools—Foundry USA, Antpool, and F2Pool—control over 60% of global hashrate. Meanwhile, US-listed mining companies like Marathon Digital and Riot Blockchain collectively hold over 100,000 BTC. This institutional structure makes selling behavior more transparent and easier for the market to price in advance.

On one hand, institutional miners typically have long-term electricity contracts and multiple financing channels, making them more resilient than individual miners and their selling more rational. On the other hand, they face quarterly earnings pressure, potentially needing to realize gains within specific windows to meet profit expectations. This "semi-rigid" demand increases the certainty of pre-halving selling, but individual sales may be large, causing short-term dips.

Notably, global hashrate growth has slowed, and the residual value of older miners (e.g., Antminer S19 Pro) has significantly declined. According to BitInfoCharts, total hashrate rose from 400 EH/s to about 550 EH/s between July and November 2023, then plateaued. This suggests that if BTC price does not rise quickly post-halving, hashrate may experience a "cascading" decline. However, this could support medium-term prices: after inefficient miners exit, mining difficulty adjusts downward, lowering marginal costs and solidifying a price floor.

4. Comprehensive Price Projections

Combining historical patterns and current structure, miner selling is unlikely to trigger a crash like "312," but may cause range-bound volatility for weeks around the halving. Specifically:

• Short-term (1–2 months before halving): Increased net miner selling, coupled with market risk aversion, may pull BTC down 20%–30% from pre-halving highs, but it is unlikely to break below the average miner cost line (around $30,000).
• At halving: Block rewards drop from 6.25 BTC to 3.125 BTC, daily new supply falls from about 900 to 450 BTC. Selling pressure eases instantly, and prices tend to stabilize.
• Medium-term (6–12 months post-halving): History likely repeats; supply tightening combined with global liquidity conditions (e.g., expected Fed rate cuts) could drive a new bull market. According to Bloomberg Intelligence, BTC has averaged over 200% gains in the 12 months after halving.

These projections assume two conditions: no systemic global economic crisis; continued incremental capital from compliant channels like Bitcoin ETFs. If these reverse, miner selling could become the last straw, but probability is low.

5. Summary and Risk Warning

Bitcoin halving is a quantitative game among miners, investors, and code. From three historical experiences, miner selling is a normal pre-halving phenomenon, with its scale and impact increasingly priced in by the market. The current institutionalization and transparency of the hashrate market further reduce uncertainty. Investors should focus more on the long-term supply-demand imbalance post-halving rather than over-analyzing short-term miner behavior. However, the cryptocurrency market is highly volatile; regulatory policies, technical risks, and market sentiment can amplify short-term impacts of miner selling.

Risk Warning: The above is for reference only and does not constitute investment advice. Digital asset markets carry extreme risk; prices may fluctuate sharply. Investors should make decisions based on their own risk tolerance. Past performance does not guarantee future results. Consult professional institutions for specific investment actions.