The First Halving: When Bitcoin Learned Scarcity

Block rewards cut in half. The supply shock that set the pattern for every bull run that followed.

Bitcoin halving mechanics

On November 28, 2012, Bitcoin's block reward dropped from 50 BTC to 25 BTC. It was the first "halving" - a pre-programmed event that occurs every 210,000 blocks, roughly every four years. It was the moment Bitcoin's deflationary monetary policy went from theory to practice.

The halving is the core of Bitcoin's economic design. Every four years, the rate of new Bitcoin creation is cut in half. This means Bitcoin's inflation rate decreases over time, eventually reaching zero around the year 2140 when the last satoshi is mined. No central bank decides this. No committee votes. The code executes. The supply shrinks. Math, not politics.

The first halving set a pattern that has repeated three more times. In the 12 to 18 months following each halving, Bitcoin's price has historically increased dramatically:

2012 halving ($12) - BTC rose to $1,100. 2016 halving ($650) - BTC rose to $20,000. 2020 halving ($8,600) - BTC rose to $69,000. 2024 halving ($64,000) - BTC rose to $126,000.

The April 2024 halving at block 840,000 cut the reward from 6.25 BTC to the current 3.125 BTC. The next halving is expected around April 2028 at block 1,050,000, when the reward will fall to 1.5625 BTC.

Correlation is not causation, and the sample size is only four halvings. But the pattern is the most-watched cycle in crypto. Miners earn less, supply growth slows, and if demand remains constant, price increases. The halving is not a magic button. But it has been the most reliable predictor of macro Bitcoin trends for 16 years.

Critics argue each halving has diminishing returns - the percentage gains shrink with each cycle. They are right. Bitcoin went from $12 to $1,100 (9,000% gain) after the first halving, but $64,000 to $126,000 (97% gain) after the fourth. The gains are compressing. But 97% on a $1.2 trillion asset is not nothing.