Only 1 million BTC left to mine: what is the market logic behind the 20 million milestone?

In March 2026, the Bitcoin network reached a historic milestone at block height 940,000 — the successful mining of the 20 millionth Bitcoin. This means that over 95% of the total supply of 21 million Bitcoins has entered circulation, leaving only 1 million left to be mined. According to the predetermined halving schedule every four years, releasing these final 1 million Bitcoins will take approximately 114 years, until around 2140.

This event is not only a mathematical milestone but also a stress test and real-world validation of Bitcoin’s core value proposition — “programmatic scarcity.” As new supply approaches its limit, market focus shifts from “how much more can be mined” to “how these supplies will be priced.”

Why is the 20 millionth Bitcoin more significant than the 10 millionth?

Quantitatively, the 20 millionth Bitcoin is just a node in the overall supply curve, but its symbolic and structural impact far exceeds a simple number. The creation of the first 10 million Bitcoins validated the technology and initial distribution, establishing the network’s fundamental value. The mining of the 20 millionth marks Bitcoin’s transition into the latter half of its lifecycle.

This reflects a structural inflection point in the supply curve. Bitcoin’s issuance mechanism causes its supply to grow logarithmically decreasing: the first 10 million took about 4 years (2009–2013), the second 10 million took about 13 years (2013–2026). The remaining 1 million will take over a century to be fully released. This “cliff-like slowdown” fundamentally alters Bitcoin’s microstructure and market expectations. When marginal new supply approaches zero, market pricing will shift from “absorbing selling pressure” to “discovering the value of existing stock.”

Why does the last 1 million take 114 years to mine?

To understand why the final 1 million takes so long, we must revisit Bitcoin’s halving mechanism. This core rule, designed by Satoshi Nakamoto, reduces the block reward by half every 210,000 blocks (~4 years).

Since the Genesis block in 2009, Bitcoin has undergone four halvings:

• 2009: 50 BTC per block
• 2012: halved to 25 BTC
• 2016: halved to 12.5 BTC
• 2020: halved to 6.25 BTC
• 2024: halved to 3.125 BTC

Following this exponential decay model, after the sixth halving (~around 2032), the block reward will fall below 0.78 BTC; by the 32nd halving (~2140), rewards per block will be less than 1 satoshi (0.00000001 BTC), and the total supply will asymptotically approach 21 million. This “speed of mining decreasing exponentially as supply increases” creates a unique supply curve where the last 1 million Bitcoins are spread over more than a century.

What structural shifts are occurring in supply and demand?

Mining the 20 millionth Bitcoin signifies a paradigm shift from “incremental growth” to “stock-based” valuation. Currently, Bitcoin’s annual inflation rate has fallen below 0.8%, much lower than gold’s approximately 1.5%. When the release of the final 1 million Bitcoins extends over a century, Bitcoin effectively becomes an asset with “near-zero supply growth.”

However, supply-side tightening is only part of the story. Structural changes on the demand side are equally critical. Since the approval of the US spot Bitcoin ETF in January 2024, traditional financial institutions like BlackRock and Fidelity have accumulated over 1 million Bitcoins. These funds enter the market through compliant channels, locking in a large portion of circulating supply. Meanwhile, many listed companies are adding Bitcoin to their treasury reserves, and some sovereign wealth funds are beginning to allocate to this emerging asset class.

As new supply diminishes annually and institutional demand continues to grow, the “supply shock” is shifting from a theoretical scenario to a quantifiable market dynamic.

What will support miners’ future income?

The halving mechanism directly impacts miners. Each halving reduces their Bitcoin-denominated revenue by 50%. After the 2024 halving, daily new Bitcoin production will drop from 900 BTC to 450 BTC, which, at current prices, will cut the industry’s annual revenue by over $10 billion.

As block rewards decline, miners must transition from “block subsidies” to “transaction fees” as their primary income. Once the last 1 million Bitcoins are mined, miners will rely solely on transaction fees paid by users. This requires the network to maintain sufficient transaction activity and fee levels to incentivize miners to continue providing computational power and securing the network. The viability of this economic model over the coming decades will be a key question for Bitcoin’s ecosystem.

Is the “digital gold” narrative being reinforced or challenged?

The 20 millionth Bitcoin milestone naturally strengthens the analogy between Bitcoin and gold: limited total supply, cost of extraction, decreasing new issuance over time. From a supply perspective, Bitcoin is even more scarce than gold — gold’s geological reserves continue to grow, whereas Bitcoin’s supply cap is immutable.

However, the question remains: is scarcity alone enough to support the “digital gold” narrative? Gold’s safe-haven properties have been validated over thousands of years, with its physical and chemical attributes enabling it to store value in any environment. Bitcoin’s “hedging” function has shown volatility and inconsistency during recent geopolitical crises: in late February 2026, escalating Middle East tensions caused Bitcoin to plunge sharply, contrasting with gold’s stable performance. Analyses suggest that Bitcoin often exhibits high-risk asset characteristics during initial panic phases — forced liquidations, liquidity crunches, rather than safe-haven buying.

Thus, the 20 millionth Bitcoin mined reinforces its “supply-side gold attributes,” but its “demand-side safe-haven qualities” still need to be tested across more cycles. Bitcoin is more likely to become a digital complement to gold rather than a direct replacement.

What does the discrepancy between circulating supply and mined supply imply?

A often overlooked fact is that a significant portion of the 20 million mined Bitcoins have permanently exited circulation. According to estimates from Chainalysis and others, about 3 to 4 million BTC are lost forever due to lost private keys, hardware failures, etc., including roughly 1 million Bitcoins mined early by Satoshi that have never moved since 2010. Excluding these “lost coins,” the actual available supply in the market is only around 15.8 to 17.5 million.

This means the real effective supply is tighter than the on-chain number suggests. During bull markets and demand surges, the irrecoverability of “lost coins” will amplify supply-demand tensions, increasing price volatility.

What uncertainties remain before 2140?

Although Bitcoin’s code rules are fixed, its operational environment remains unpredictable. Over the next century, several key variables could influence its trajectory:

• The potential threat of quantum computing to cryptographic algorithms. While current Bitcoin cryptography (SHA-256, elliptic curve signatures) remains secure, breakthroughs in quantum tech could force network upgrades or hard forks.
• Divergent regulatory landscapes. Different countries’ classifications of Bitcoin as a commodity, currency, security, or illegal asset will impact cross-border liquidity and usability.
• Changes in macroeconomic paradigms. Bitcoin emerged in the post-2008 financial crisis era of quantitative easing; a fundamental shift in the global monetary system could reshape its narrative and role.

Summary

The mining of the 20 millionth Bitcoin is not the end of Bitcoin’s story but a turning point from “issuance phase” to “maturity phase.” As new supply approaches zero, market pricing will shift from “future supply pressure” to “distribution of existing value.” The remaining 1 million Bitcoins will be released gradually over more than a century, becoming the final piece of the Bitcoin economic model puzzle. For participants, this means shifting analytical frameworks — from “halving cycles” to “stock-based valuation,” from “supply shocks” to “real circulation and holder structure” microanalysis.

FAQ

Q: What does the mining of the 20 millionth Bitcoin signify?

A: Over 95.2% of Bitcoin’s total supply of 21 million has entered circulation, with only about 1 million left to be mined over roughly 114 years. This marks a structural inflection point where the supply curve transitions from steep to flat.

Q: Why does the last 1 million take so long to mine?

A: Because of Bitcoin’s halving mechanism, which causes the new issuance rate to decrease exponentially as total supply increases. The more we approach the cap, the fewer new coins are created per block.

Q: Is the actual circulating supply equal to the mined amount?

A: No. An estimated 3 to 4 million Bitcoins are permanently lost due to lost keys or hardware failures, so the effective circulating supply is significantly lower than the total mined.

Q: How will miners earn revenue after all Bitcoins are mined?

A: They will rely entirely on transaction fees paid by users. This requires the network to maintain sufficient transaction activity and fee levels to incentivize miners to secure the network.

Q: Can Bitcoin now be called “digital gold”?

A: In terms of supply attributes (scarcity, halving, cost of extraction), Bitcoin is highly similar to gold; but in demand attributes (hedging, volatility), it still needs more cycles to validate. Currently, it is more accurate to see Bitcoin as a “high-risk asset with gold-like supply properties.”