比特幣挖礦解釋
📖 6 min read
Quick Answer
Mining is how new bitcoin is created and how the network agrees on history. Miners burn electricity to win a global guessing game; the winner writes the next block and is paid in fresh bitcoin. It sounds wasteful, but that cost is exactly what makes Bitcoin secure.
💡 Think of it as…
一種全球性的彩票，每十分鐘開獎一次，購買彩票意味著花費電力進行數萬億次的猜測。您購買的門票越多，中獎的機會就越大，獲勝者將有權將下一頁添加到分類帳中並領取獎勵。
The puzzle (Proof of Work)
Miners repeatedly hash a candidate block, changing one number, until they find a hash below a target value. There is no shortcut — only brute-force guessing. Finding a valid hash proves real work and energy were spent.
The block reward & fees
The winning miner earns the block subsidy (newly minted bitcoin) plus the fees of the transactions they include. The subsidy halves roughly every four years — the "halving" — slowly capping supply at 21 million coins.
難度調整
每兩週左右，網路就會自動重新調整謎題的難度，因此無論有多少算力加入或離開，區塊都會大約每 10 分鐘到達一次。這種自我平衡是比特幣安靜的傑作之一。
🔑 Key takeaway
Mining secures Bitcoin by making it expensive to write history and impossible to fake cheaply. Energy in, security and new coins out.
Why this matters for you
亞洲是採礦業的中心：哈薩克、蒙古和東南亞部分地區等能源便宜的地區擁有主要採礦作業。了解挖礦還可以解釋為什麼供應是固定的——這是比特幣作為通膨對沖工具的核心。
常見問題
我還能在家開採比特幣嗎？▼
Profitably, almost never with a laptop or PC. Modern mining needs specialized ASIC machines and very cheap electricity. Most people are better off simply buying Bitcoin.
Is Bitcoin mining bad for the environment?▼
It uses significant energy, but a growing share comes from stranded, surplus, or renewable sources, and miners increasingly monetize energy that would otherwise be wasted. It is a genuine and nuanced debate.
What happens when all 21 million are mined?▼
New issuance ends around the year 2140; miners will then be paid entirely by transaction fees. Most coins are already mined today.