The Halving Aftermath: One Year of Reduced Supply

On April 17, 2025, at block height 840,000, Bitcoin's fourth halving executed without ceremony. The block reward dropped from 6.25 BTC to 3.125 BTC. No one pushed a button. No committee voted. The code, written years before the event, simply ran.

One year later, the consequences are measurable. Exactly 164,250 fewer bitcoins exist than would have under the previous issuance schedule. Daily issuance fell from approximately 900 BTC to 450 BTC — a supply reduction that is small in absolute terms but structurally significant in a market where demand has been steadily increasing.

The halving is Bitcoin's most predictable event and its most misunderstood. It is not a catalyst. It is a slow compression.

The Supply Mathematics

The numbers are straightforward. At 3.125 BTC per block and an average of 144 blocks per day, the network now produces approximately 450 BTC daily — about $30 million at current prices, down from roughly 900 BTC per day before the halving. Over the past year, that difference compounds: 164,250 BTC were mined instead of the 328,500 that would have existed under the old schedule, leaving total supply at approximately 19,845,000 BTC with roughly 1,155,000 BTC still unmined.

The current annual inflation rate of Bitcoin is approximately 0.83% — lower than gold's estimated 1.5–2% annual supply increase. After the next halving in 2028, it will drop below 0.5%. Bitcoin is now, by any reasonable metric, the hardest money in existence by supply issuance rate.

But supply alone does not determine price. What matters is the relationship between new supply and new demand — and over the past year, the demand side of the equation has been the more interesting variable.

The Price Cycle

Every halving in Bitcoin's history has preceded a significant price appreciation — though the magnitude has diminished with each cycle, and the timing has lengthened. The pattern is not a law of nature, but it is a pattern.

The first halving in November 2012 launched Bitcoin from $12 to a peak of $1,150 — roughly a 96x move reached in about twelve months. The second, in July 2016, produced a more modest 30x from $650 to $19,700 over seventeen months. By the third halving in May 2020, the multiple had compressed further: 8x, from $8,600 to $69,000, over eighteen months. Each cycle starts from a higher base, and the market capitalization required for equivalent percentage moves grows exponentially.

The fourth halving began at $64,000. A 30x from that level would imply a $1.9 million Bitcoin and a $40 trillion market cap. That is not impossible, but it would require a fundamentally different class of buyer than previous cycles.

One year in, Bitcoin is trading in the $65,000–72,000 range. By the standards of the third cycle's timeline, this would place us roughly at the equivalent of late 2021 — the acceleration phase before the blow-off top. Whether this cycle follows the same script remains the most debated question in crypto markets.

The bull case: ETF inflows, sovereign adoption signals, and the supply squeeze create a delayed but powerful move higher. The bear case: the market has already priced in the halving, institutional participation dampens volatility, and the cycle of diminishing returns continues to flatten.

Miner Economics: Survival of the Efficient

The halving's most direct impact falls on miners. Their revenue from block rewards was cut in half overnight — a stress test that every halving cycle imposes on the mining industry.

The result has been predictable: consolidation. Miners with older hardware, expensive electricity, or thin margins have either upgraded, shut down, or been acquired. The survivors are more efficient, better capitalized, and operating at scale.

The financial pressure is visible in every metric. Daily block reward revenue fell from roughly $58 million to $31 million, yet the network's hashrate paradoxically climbed from 620 EH/s to 800 EH/s over the same period. Revenue per exahash collapsed from about $98,000 to $46,000 per day. This apparent contradiction is explained by hardware efficiency gains. The new generation of ASICs — Bitmain S21 XP, MicroBT M66S — is so much more efficient than the prior generation that miners can remain profitable even with half the block reward, provided they have upgraded their equipment and secured electricity near $0.04/kWh, which keeps the breakeven price around $22,000 regardless of the subsidy level.

The most consequential shift, however, is in the fee market. Transaction fee revenue has doubled from roughly $3 million to $6 million per day, pushing fees from 5% to 16% of total miner income. This is not yet sufficient to sustain mining in a hypothetical zero-subsidy future, but the trend line matters. As block rewards continue to halve every four years, fee revenue must eventually replace issuance revenue entirely. The transition has begun.

Miners who did not upgrade are gone. The network does not mourn them.

Network Health Through the Transition

One of the most remarkable aspects of the halving is how little the network noticed. Block times held steady at roughly 9.7 minutes, virtually unchanged from the 9.8-minute pre-halving average. The difficulty adjustment — Bitcoin's self-correcting mechanism that recalibrates every 2,016 blocks — handled the transition seamlessly, averaging +2.8% per epoch compared to +3.2% before the halving. No disruption, no drama.

Beneath that stability, usage patterns have shifted. The average mempool has swollen from 12 MB to 18 MB, and average fees have climbed from 22 sat/vB to 35 sat/vB. This is partly due to Ordinals and BRC-20 token activity continuing to consume block space, and partly due to organic growth — daily transaction throughput has risen from roughly 620,000 to 680,000 transactions. Whether you view higher fees as a problem (more expensive to transact) or a feature (stronger security budget) depends on your perspective on what Bitcoin is for.

The throughput gains themselves reflect growing SegWit and Taproot adoption, which uses block space more efficiently. The network is processing more economic activity per block than at any point in its history.

The Stock-to-Flow Question

No discussion of Bitcoin halvings is complete without addressing the stock-to-flow model — the framework popularized by the pseudonymous analyst PlanB, which predicted Bitcoin's price based on its scarcity ratio (existing supply divided by annual production).

The model predicted a price of roughly $500,000 by this point in the cycle. The current price is approximately $68,000. The model has failed — not on direction, but on magnitude by an order of magnitude.

This does not invalidate scarcity as a factor in Bitcoin's valuation. It simply means that scarcity alone is insufficient to model price. Demand, regulation, macroeconomic conditions, and market microstructure all matter. The halving reduces supply. It does not guarantee a specific price response.

What One Year Tells Us

The fourth halving confirmed several things. Bitcoin's monetary policy works as designed — the supply reduction executed perfectly, the network self-corrected, and mining remained economically viable for efficient operators. The transition from issuance-dependent to fee-dependent security is underway, though it remains in early stages.

What it has not yet confirmed is whether this cycle will produce the kind of price appreciation that previous cycles did. The structural conditions are different — institutional participation via ETFs, a more mature derivatives market, and macroeconomic headwinds from tight monetary policy globally.

The next twelve months will provide more data. For now, the supply compression continues: 450 BTC per day, every day, until the next halving in 2028 cuts it to 225. The issuance clock does not wait for the market to catch up.