Current Bitcoin mining difficulty (mempool.space)
Why: Adjusts every ~2016 blocks to maintain 10-minute block times. Rising difficulty confirms miner confidence.
Category: bitcoin. Bitcoin on-chain metrics track network activity, mining operations, and market structure.
Source: mempool.space. Updated: Daily (read every 30 minutes, one figure a day).
API: GET /api/metrics/bitcoin-difficulty
Used in briefings: BTC Context, Grid Stress, On-Chain Health, Miner Survival Index, Energy Cost Index
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