Bitcoin ETFs bought nearly twice what miners produced in Q3—but $430 million left on Thursday

US spot Bitcoin ETF outflows totaled $430 million on Nov. 5, according to Farside Investors.Bitcoin's ETF buyers added 79,800 BTC in the third quarter, against 41,300 BTC newly mined, according to 21Shares' Nov. 2 report. The comparison supports the scarcity argument, but offers limited reassurance about demand today: most of that buying arrived in two short windows, while older-holder balances fell by much more.For Bitcoin holders assessing a supply squeeze, the unresolved question is whether fund demand persists between those buying bursts. New issuance is only one part of the picture. Coins already held by existing investors can also move, so purchases exceeding mining output do not establish how much supply buyers must absorb at a given price.The 21Shares figures cover Q3 through Sept. 30. Aug. 17-27 and Sept. 21-25 accounted for 91% of ETF inflows measured in Bitcoin.The same report recorded a 248,000 BTC reduction in long-term-holder balances during Q3. That larger change puts existing holdings alongside issuance in the scarcity discussion. However, it is a net balance decline, not a measured total of executed market sales.Q3 Bitcoin demand: magnitude and timingSeparate BTC m...