💡 Bitcoin has a hard cap of 21M coins — no more, no less. As of Sept 2025, 93-94% (19.6M+) BTC is already mined, leaving only ~1.4M BTC. The final Bitcoin is expected around 2140 when block rewards hit zero.

⚡ Key Scenarios After 2140

đŸ›Ąïž Network Security: Miners will rely solely on transaction fees. If BTC’s value & usage stay strong → fees may be enough. If not → lower hashrate could risk 51% attacks.

📈 Price Impact: With no new supply + millions of lost coins, BTC becomes deflationary digital gold. Limited supply + steady demand = 🚀 potential price growth.

🔗 Transactions: Fees may rise, making BTC more useful for large-value transfers, while Lightning Network handles small/fast payments.

✅ Bottom line: Bitcoin won’t stop when the last coin is mined — it will simply shift into a fee-driven, fixed-supply era, reinforcing its role as sound money.