Bitcoin's fourth halving arrived at 00:09 UTC on April 20, 2024, when mining pool ViaBTC added block 840,000 to the chain and the network's block subsidy dropped from 6.25 BTC to 3.125 BTC. The event itself was a non-event by design — a line of monetary policy written into Bitcoin's code in 2009, executing exactly on schedule. But the two years since have rewritten much of what the market thought it knew about halving cycles. The price gains that followed were the weakest of any halving epoch on record, transaction fees collapsed after a spectacular opening spike, and the mining industry went through a consolidation that permanently changed who can survive in the business.
What the Halving Actually Changed
The mechanics were simple and predictable. Before block 840,000, miners earned 6.25 BTC for each block they added, putting roughly 900 new bitcoin into circulation every day. Afterward, the subsidy fell to 3.125 BTC and daily issuance dropped to about 450 coins. By the time the halving executed, roughly 19.69 million of Bitcoin's fixed 21 million supply had already been issued, and the schedule of halvings every 210,000 blocks means the final fraction of a coin will not be mined until around 2140.
As CoinDesk reported at the time, bitcoin's price barely moved through the event, holding above $63,000 in the hours after the subsidy cut. Fidelity Digital Assets later put the halving-day reference price at $63,762. The market had seen this coming for four years; there was nothing left to price in.
A Record-Fee Block, Courtesy of Runes
The one genuine surprise on halving night came from transaction fees. Casey Rodarmor's Runes protocol — a system for issuing fungible tokens directly on Bitcoin — launched at block 840,000, and speculators paid extraordinary sums to get their token etchings into the earliest blocks. The halving block itself carried 37.6 BTC in fees, worth more than $2.4 million, against a normal pre-halving range of $40,000 to $60,000 per block. Within an hour, 853 runes had been etched.
The median fee rate jumped from around 100 sats/vByte before the halving to 1,805 sats/vByte afterward, pushing an ordinary medium-priority transaction to roughly $146. "We've not had anything like this in the history of Bitcoin. We're stressing the network in a different way," Bitcoin developer and author Jimmy Song told CoinDesk that weekend.
The frenzy did not last. Kaiko's research on the halving's first anniversary found that fees fell back quickly and stayed mostly well below the 3.125 BTC subsidy. Over the first year after the 2024 halving, miners collected just over 8,000 BTC in transaction fees — compared with roughly 37,000 BTC in the year that followed the 2020 halving, when DeFi and NFT activity kept blockspace in constant demand.
The Weakest Post-Halving Cycle on Record
Halvings earned their reputation because of what historically followed them. According to Kaiko's anniversary analysis, bitcoin surged roughly 7,000% in the cycle after the 2012 halving, 291% after 2016, and 541% after 2020. The 2024 cycle broke the pattern. One year on, bitcoin was trading in the $80,000–$90,000 range — the weakest post-halving performance on record in percentage terms.
Fidelity Digital Assets' one-year retrospective measured the move precisely: from $63,762 on halving day to $83,671 on April 15, 2025, a gain of about 31%. At the equivalent point in the previous epoch, bitcoin had rallied more than 300%. The price did go on to set new records — first above $108,000, and by mid-2025 above $120,000 — but the four-year rhythm of explosive post-halving rallies clearly weakened.
Two structural explanations stand out. First, the spot bitcoin ETFs approved in the United States in January 2024 pulled forward much of the demand that might otherwise have arrived after the halving; institutional flows, not the supply schedule, became the dominant price driver. Second, macro conditions were unusually hostile: Kaiko notes the Economic Policy Uncertainty Index averaged 317 in the first quarter of 2025, versus readings of 107 to 186 during the comparable windows after earlier halvings. Volatility told the same maturation story, with bitcoin's 60-day price volatility compressing from more than 200% in the 2012 era to around 50%.
Miners: Squeezed, Consolidated, Diversified
For miners, the halving was an overnight 50% pay cut on their guaranteed revenue, and the fee windfall that briefly cushioned it evaporated within weeks. Hashrate dipped as the least efficient machines went offline, then recovered fast. Fidelity's data shows the network's 30-day mean hashrate rose about 40% in the year after the halving, with daily hashrate crossing one zettahash (1 ZH/s) for the first time in April 2025. Difficulty climbed roughly 40% over the same period, while hash price — revenue per unit of computing power — fell about 60%.
That squeeze accelerated an industry shakeout. Operators that had locked in cheap power, upgraded to current-generation hardware and raised capital before April 2024 absorbed the cut; those carrying heavy debt or running aging fleets restructured, sold themselves or shrank. A growing number of large public miners also diversified into AI and high-performance computing hosting through 2024 and 2025, repurposing power capacity and data-center expertise toward customers that pay in dollars rather than block rewards.
What It Sets Up for 2028
The fifth halving is already fixed in code: at block 1,050,000, expected around spring 2028, the subsidy falls again to 1.5625 BTC. The 2024 experience reframes what that event is likely to mean. The supply shock keeps shrinking in relative terms — each halving now removes a smaller slice of new issuance from a much larger, more liquid market — while fee revenue has not yet grown into the role of replacing the subsidy, a long-term security question the 8,000 BTC fee year made harder to ignore.
What the 2024 halving demonstrated most clearly is that Bitcoin's monetary policy executes flawlessly regardless of the market around it. The block reward halved on schedule, the network kept producing blocks, and hashrate reached all-time highs within a year. What it no longer guarantees is the reflexive four-year price script. As institutional ownership deepens and volatility compresses, each halving looks less like a market catalyst and more like what it always was underneath: a scheduled, unstoppable tightening of the hardest supply curve in finance.