Bitcoin Supply Nears Limit: 95% in Circulation, Mining Rewards Continue to Diminish

Bitcoin's total supply is capped at 21 million coins, and currently, over 95% of the coins have entered circulation. This milestone signifies the gradual realization of its scarcity mechanism. Bitcoin systematically reduces the production of new coins through a 'halving' event every four years. In the early days, miners could earn over 15,000 BTC for each block mined, but with the latest halving in 2024, the block reward has dropped to 3.125 BTC. The next halving will occur in 2028, further reducing it to 1.5625 BTC.

Bitcoin's issuance curve follows a strict mathematical model: mining the first 20 million bitcoins took approximately 17 years, while the remaining approximately 1 million are expected to take as long as 114 years to produce. This slow and predictable release rate not only reinforces its scarce attribute as a digital asset but also builds long-term deflationary expectations.

As block rewards continue to diminish, miners' revenue structure is undergoing a profound transformation. The profit model, which previously relied on subsidies, is gradually shifting towards a revenue system centered on transaction fees. In the future, when block rewards become negligible, transaction fees will become the primary economic incentive for maintaining network operation and security. This transition has sparked ongoing discussions within the industry: can transaction fees support sufficient hashrate protection in the long term to prevent network attacks? Bitcoin's fixed total supply and decentralized consensus mechanism set it apart from the traditional financial system. As the circulating supply approaches its limit, market recognition of the 'digital gold' narrative continues to grow. Bitcoin Magazine points out that the 95.24% issuance rate is a strong proof of its successful implementation of digital scarcity. Even as it enters the final stages of mining, Bitcoin continues to be released steadily at a very low rate, ensuring its long-term credibility as a store of value.