Foundry USA pool mined the 20 millionth Bitcoin on March 10, 2026, leaving only 1 million BTC remaining to be mined over approximately 114 years.
Foundry USA pool mined the 20 millionth Bitcoin at block 939,999 on March 10, 2026, marking a watershed moment in the asset's history. Only one million Bitcoin remains to be mined, and current block rewards mean that supply will take roughly 114 years to exhaust.
The milestone arrived after 17 years and 2 months of mining activity dating from Satoshi Nakamoto's genesis block on January 3, 2009. The network has now brought 95.24% of all Bitcoin that will ever exist into circulation. The mathematical certainty of Bitcoin's supply cap—21 million coins—remains the core property that distinguishes it from any fiat currency.
The current block reward stands at 3.125 BTC per block following the most recent halving in April 2024. Every 210,000 blocks, this reward is cut in half. The next halving is scheduled for April 2028, which will reduce the reward to 1.5625 BTC per block. This geometric series of halvings continues until the reward reaches zero, at which point no new Bitcoin can be created.
However, the effective supply circulating in the market is substantially lower than 20 million. Researchers estimate that between 2.3 and 3.7 million Bitcoin have been permanently removed from circulation through lost private keys, deceased holders, forgotten hardware wallets, and early coins burned in transaction fees before best practices became standard. These coins remain locked in perpetuity.
Foundry USA's pool holds the largest mining infrastructure in North America and has consistently secured the majority of blocks in recent years. The pool is operated by Core Scientific, a publicly traded mining company. Foundry's dominance reflects the concentration of hash rate among large-scale operations with institutional backing and favorable power access.
The twenty-million mark carries symbolic weight but no protocol-level significance. The remaining one million Bitcoin will be mined at an accelerating pace relative to total supply, but the absolute number of blocks needed to extract them ensures decades of continued mining activity. The next milestone events—halvings every four years—will have more impact on mining economics.
Miners have long relied on transaction fee revenue as block rewards approached marginal rates. At current Bitcoin valuations and transaction volumes, fees alone cannot sustain industrial-scale mining without price appreciation. This economic transition remains the critical test for Bitcoin's long-term security model. If fees prove insufficient to incentivize hash rate, network security could face pressure.
The 20 millionth Bitcoin's mining attracted less attention than previous round-number milestones, reflecting Bitcoin's maturation. The asset is no longer a curiosity but an established protocol with a predictable supply schedule and global trading infrastructure. The remaining hundred years of mining will be a footnote in Bitcoin's story—an epilogue to an already-written narrative about scarcity and protocol design.
