Mining and Supply
Bitcoin mining involves solving complex cryptographic puzzles.
Miners confirm transactions and add them to the blockchain.
They receive rewards in the form of newly minted bitcoins + transaction fees.
Current block reward: 3.125 BTC (after the halving in 2024).
Mining difficulty adjusts every 2016 blocks (~2 weeks).
More than 19.7 million BTC have already been mined.
The last bitcoin is expected to be mined around the year 2140.