Bitcoin will never hit 21 million.
Not because of lost keys or forgotten wallets. Because of something deeper.
The actual supply is already ~179 BTC short... and shrinking.
Here's why the "hard cap" isn't quite what you think 🧵
Miners Making Mistakes:
Miners sometimes... just don't claim their rewards.
Block 501,726: Miner solved the block, forgot to claim 12.5 BTC. Gone forever.
Block 526,591: Claimed 6.25 instead of 12.5 BTC. Oops.
In 2011, a miner named "midnightmagic" intentionally under-claimed by 1 satoshi as tribute to Satoshi. The smallest possible sacrifice.
Total "under-claimed": ~29 BTC just... disappeared.
The Genesis & The Bug:
Then there's the stuff you can't spend even if you wanted to:
• Block 0 (Genesis): Satoshi's first 50 BTC are hardcoded unspendable
• The Overwrite Bug: Early code glitch erased 100 BTC in 2011 when two blocks got the same ID
These aren't "lost" — they're provably destroyed. The blockchain knows they're gone.
Running tally: ~179 BTC
The Rounding Error:
Finally: Bitcoin's math isn't quite 21 million.
Because of how halving rounds down to whole satoshis, the theoretical max is actually:
20,999,999.9769 BTC
Not 21,000,000.
Subtract the ~179 BTC destroyed...
True max supply: ~20,999,821 BTC
So when someone says "21 million Bitcoin," remember:
• It's already ~179 BTC short
• The real cap is ~20,999,821
• And it's harder money than even the whitepaper promised
Scarcity isn't just the design. It's the reality.
Stack accordingly, villagers. 🏘️