Scarcity on a Schedule
Every four years or so, something happens to Bitcoin that has no equivalent in traditional finance. The protocol cuts the flow of new coins in half. This event is called the halving.
The rules are built into Bitcoin’s code. Miners who add new blocks to the blockchain receive a block reward. Every 210,000 blocks, that reward drops by 50%.
No one can stop it. No one can change it. For the full technical details, read Bitcoin’s monetary policy explained.
This article is about what happened each time. Four halvings have occurred since Bitcoin launched in 2009. Each one told a different story about Bitcoin’s growing place in the world.
The Four Halvings
November 28, 2012 — Block 210,000
The first halving cut the reward from 50 BTC to 25 BTC per block. Bitcoin was barely three years old. One coin was worth about $12.
Most of the world had no idea Bitcoin existed. The network was still a small experiment run by hobbyists and privacy advocates. Some miners worried the cut would kill their incentive. They were wrong — mining power kept growing.
Within twelve months, the price rose from $12 to over $1,000. The first halving was a quiet event that preceded Bitcoin’s first major price surge.
July 9, 2016 — Block 420,000
By the second halving, Bitcoin was no longer a secret. The reward dropped from 25 BTC to 12.5 BTC. One coin was worth roughly $650.
This time, the halving was anticipated. Traders debated whether the market had already reacted before the event. Media coverage picked up. The community had grown from a small forum into a global network.
Eighteen months later, Bitcoin reached nearly $20,000 in December 2017 — the peak of the 2017 bull run. The second halving cycle introduced Bitcoin to the mainstream. For the first time, people who had never heard of blockchain were asking how to buy it.
May 11, 2020 — Block 630,000
The third halving arrived during a global crisis. COVID-19 had crashed markets worldwide just two months earlier. Bitcoin dropped below $4,000 in March 2020 before recovering.
The reward fell from 12.5 BTC to 6.25 BTC. Bitcoin was trading around $8,600 on halving day. Despite the chaos, the network did not miss a beat. Blocks kept arriving roughly every ten minutes, exactly as designed.
This cycle brought institutional adoption for the first time. Companies added Bitcoin to their balance sheets. By November 2021, the price reached an all-time high near $69,000.
April 19, 2024 — Block 840,000
The fourth halving was unlike the others. For the first time, Bitcoin set a new all-time high before the halving, not after.
New investment products launched in early 2024 brought billions of dollars in fresh demand. Bitcoin hit a record high in March 2024, weeks before the halving.
By halving day, Bitcoin was trading around $64,000. The reward dropped from 6.25 BTC to 3.125 BTC. Daily issuance fell from roughly 900 to 450 new coins. Bitcoin’s annual supply growth dropped below 1% for the first time in its history.
The fourth halving marked a shift. With nearly 95% of all bitcoin already mined, the supply cap of 21 million was no longer abstract. It was becoming real. Bitcoin was no longer just a retail phenomenon — Wall Street was now a buyer.
The Pattern Debate
Every halving has been followed by a significant price increase. But each cycle brought smaller percentage gains. The first halving preceded an 8,000% rally. The fourth produced the weakest post-halving returns on record.
Some analysts built price models around this pattern. The most famous predicted prices based on how rare Bitcoin becomes after each halving — a scarcity ratio. It gained a large following and generated equally large criticism when its predictions diverged from reality.
The core question is simple. Does the halving cause price increases by reducing new supply? Or do other factors — media attention, institutional adoption, global economics — do the heavy lifting? There is no consensus.
What is clear is that each halving reduced the rate of new coins entering circulation. About 19.9 million of the 21 million coins are already mined. Each remaining halving will have a smaller impact on total supply. The next one is expected around mid-2028, when the reward will drop to 1.5625 BTC.
What’s Next
Whether or not halvings cause price rallies, they serve a deeper function. Every four years, the network proves that its rules cannot be changed.
No CEO decided to keep the old reward. No board voted to delay the cut. The code ran. The reward dropped. The network moved on.
To understand the full supply schedule, read Bitcoin’s Monetary Policy Explained. To see how miners earn their rewards, read What is the Block Reward?. To learn why scarcity gives Bitcoin value, read Why Does Bitcoin Have Value?.