According to the source, traders are centering their BTC playbooks on three verified drivers: miner economics after the April 2024 halving reduced the block subsidy to 3.125 BTC at height 840000, persistent on-chain fee pressure from inscription activity, and the liquidity impact of US spot ETF primary flows. Source: Bitcoin.org; mempool.space; U.S. Securities and Exchange Commission. The halving mechanically lowered baseline miner revenue, increasing sensitivity to fee cycles and BTC price for hashprice and potential treasury adjustments observable in industry hashprice indices. Source: Bitcoin.org; Luxor Hashprice Index. Inscription-heavy periods have corresponded with sustained mempool backlogs and elevated sat/vB fees, affecting confirmation times and exchange batching strategies that can influence short-term on-chain settlement costs. Source: mempool.space. SEC approval of multiple spot Bitcoin ETFs on January 10, 2024 enabled creations and redemptions that coincide with substantial custodian inflows reported by issuers and with observed declines in exchange-held BTC during strong net inflow periods. Source: U.S. Securities and Exchange Commission; iShares IBIT issuer reports; Glassnode exchange balance dashboards. For trading, key signals to monitor include miner reserve and hashpower trends, daily spot ETF net creations or redemptions, and on-chain fee regimes alongside futures basis and open interest for leverage buildup risk. Source: CryptoQuant miner reserve metrics; issuer daily flow reports; mempool.space fee charts; CME Group futures data.