According to @EricBalchunas, IBIT (iShares Bitcoin Trust) reached $99.5 billion in assets last week before a pullback, coming inches from the $100 billion mark he described as an 'inevitable milestone' (source: Eric Balchunas on X, Oct 11, 2025). For traders, the $100B level is now a clear sentiment and headline threshold to monitor for BTC and spot Bitcoin ETF flow dynamics, given Balchunas’ emphasis on proximity and inevitability (source: Eric Balchunas on X, Oct 11, 2025).