The SEC approved a fourfold increase in options limits on BlackRock's iShares Bitcoin Trust — from 250,000 to 1,000,000 contracts — while its crypto rulemaking push entered White House review for formalization. These moves won't make TikTok headlines. But they matter more than most launches. Larger IBIT options limits let institutions hedge bigger positions and build deeper liquidity around ETF-linked Bitcoin exposure. Meanwhile, formal rulemaking — including proposed...