Bitcoin Mining is the process by which new Bitcoin transactions are validated and added to the blockchain, and new BTC is introduced into circulation. Miners compete to solve a cryptographic puzzle — finding a number (nonce) that, when combined with block data and hashed with SHA-256, produces a result below a target value. This is pure computational brute force; the difficulty automatically adjusts every 2,016 blocks to maintain a 10-minute average block time regardless of how many miners join or leave the network.
The miner who solves the puzzle first broadcasts the new block to the network and earns the block reward (currently 3.125 BTC after the April 2024 halving) plus all transaction fees in that block. Modern Bitcoin mining is dominated by industrial-scale operations using ASIC (Application-Specific Integrated Circuit) hardware — chips designed exclusively for SHA-256 hashing. Consumer CPUs and GPUs cannot profitably mine Bitcoin today.
Bitcoin mining’s energy consumption is a topic of significant debate. Proponents argue it incentivises renewable energy development; critics argue it is wasteful. Mining operations are typically located where electricity is cheapest — often hydroelectric regions or areas with stranded energy resources.
Example: A Bitcoin mining farm in Texas runs 1,000 Antminer S19 Pro units consuming 3.25MW of power at $0.04/kWh. At $60,000 BTC, the operation earns approximately $180,000/month in block rewards against $93,600/month in electricity costs, netting $86,400 profit monthly.
Learn more: Investopedia — Bitcoin Mining Explained
