Mining in cryptocurrency refers to the computational process of validating transactions and adding new blocks to a Proof-of-Work blockchain, such as Bitcoin. Miners use specialised hardware to solve complex mathematical puzzles (finding a hash below a target value) — a process called Proof-of-Work. The first miner to solve the puzzle earns the right to add the next block and receives a block reward plus transaction fees as payment.
Mining serves two critical purposes: it secures the network by making it computationally expensive to alter transaction history (an attack would require controlling 51% of all mining power), and it introduces new coins into circulation in a predictable, decentralised way — replacing the role that central banks play in traditional finance.
Modern Bitcoin mining requires specialised ASIC (Application-Specific Integrated Circuit) hardware. Mining profitability depends on electricity costs, hardware efficiency, Bitcoin’s price, and network difficulty — which automatically adjusts every 2,016 blocks to maintain a 10-minute average block time. Most miners join mining pools, combining their computing power to earn more consistent (though smaller) rewards.
Example: A miner invests $5,000 in an Antminer S19 Pro ASIC. Running at $0.06/kWh electricity, it generates approximately $8–15 per day in Bitcoin rewards, breaking even in 12–18 months depending on BTC price.
Learn more: Investopedia — How Bitcoin Mining Works
