Bitcoin, the world’s most popular cryptocurrency, has a strict supply limit of 21 million coins. This capped supply is one of the primary reasons Bitcoin is often referred to as “digital gold”. It creates scarcity, which can help increase its value. But how many Bitcoins are left to mine, and what does this mean for the future of the currency?
As of August 2025, over 19.9 million Bitcoins have been mined, leaving just under 1.1 million BTC still to be discovered. These remaining coins will be released gradually over the next 115 years due to a process in the Bitcoin protocol known as halving.
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“Comprehending Bitcoin Mining”
Bitcoin mining applies to verifying and adding transactions to the blockchain, which is Bitcoin’s public ledger. Miners receive new Bitcoins as a reward each time they successfully process a block of transactions. This reward began at 50 BTC per block in 2009 and is halved approximately every four years.
The most recent halving happened in April 2024, lowering the reward from 6.25 to 3.125 BTC per block. Consequently, approximately 450 new Bitcoins are generated daily, based on around 144 blocks mined each day.
When will the last Bitcoin be mined?
Across 94% of all Bitcoins have already been tunneled, though the last Bitcoin won’t be tunneled until near the year 2140. This delay is due to a process called halving, which reduces the supply of new Bitcoins over time. Each halving event cuts in half the number of new Bitcoins created daily, slowing the overall growth of the total supply.
By around 2035 to 2040, over 99% of all Bitcoins will have been mined, leaving just a small fraction to be released over the next century.
What Happens After All Bitcoins Are Mined?
Once all 21 million Bitcoins are tunneled, no new BTC will ever be created. Miners will still be incentivised to maintain network security and verify transactions through transaction fees, which users pay when sending BTC.
Satoshi Nakamoto designed Bitcoin to ensure its long-term sustainability. This structure mimics the scarcity of precious metals, like gold, causing Bitcoin to be a deflationary asset.
Lost bitcoins decrease the overall supply available.
It’s essential to recognise that not all 21 million Bitcoins will be available for use. Experts estimate that between 3 to 4 million BTC have permanently failed. This includes coins sent to incorrect addresses, coins for which private keys have been lost, and a significant number believed to belong to Satoshi Nakamoto himself, which have remained untouched since 2009.
This indicates that the actual ventilating supply is much lower than 21 million, which supplements. The scarcity of Bitcoin is a lack.
Conclusion
As of mid-2025, roughly 1.1 million Bitcoins will still be functional to disinter. Halving events, which occur every four years, reduce the mining reward, leading to a rapid decrease in the issuance of new BTC. Most Bitcoins are expected to be mined within the next two decades; however. The very last Bitcoin will take over a century to mine. This scarcity model ensures that Bitcoin remains a rare and valuable digital asset for generations to come.
