Today I’ll mention just one number: 9.989 billion USD.
This is the single-day net inflow of the U.S. Bitcoin spot ETF on September 21.
What does that mean?
It sets an 11-month single-day record (the previous one was 1.2 billion on October 6, 2025). That figure is more than twice the amount of the net outflow from a day one week earlier (450 million).
For example: BlackRock’s IBIT saw inflows of 381 million; ARK’s ARKB saw inflows of 289 million; Fidelity’s FBTC saw inflows of 239 million.
Institutions aren’t waiting—they’re scrambling to accumulate.
What matters even more than this number is something else: the average cost basis of ETF investors is about $81,700, and with BTC around $86,000, ETF holders—at the overall average level—have entered overall first-time profitability this year.
So what does that imply?
It means the "break-even sell pressure" that had been sitting above $80,000 is being digested.
If money keeps flowing in after breaking the cost basis level, then it’s not just a rebound—it’s a trend reversal.
Of course, the price has risen too fast in the short term: up 16% in a week, so a pullback could happen at any time.
But once the direction is established, it usually doesn’t change easily.
How far do you think this move can go? Let’s talk in the comments.
$BTC #BinanceSquare #BTC #ETF #机构资金
This is the single-day net inflow of the U.S. Bitcoin spot ETF on September 21.
What does that mean?
It sets an 11-month single-day record (the previous one was 1.2 billion on October 6, 2025). That figure is more than twice the amount of the net outflow from a day one week earlier (450 million).
For example: BlackRock’s IBIT saw inflows of 381 million; ARK’s ARKB saw inflows of 289 million; Fidelity’s FBTC saw inflows of 239 million.
Institutions aren’t waiting—they’re scrambling to accumulate.
What matters even more than this number is something else: the average cost basis of ETF investors is about $81,700, and with BTC around $86,000, ETF holders—at the overall average level—have entered overall first-time profitability this year.
So what does that imply?
It means the "break-even sell pressure" that had been sitting above $80,000 is being digested.
If money keeps flowing in after breaking the cost basis level, then it’s not just a rebound—it’s a trend reversal.
Of course, the price has risen too fast in the short term: up 16% in a week, so a pullback could happen at any time.
But once the direction is established, it usually doesn’t change easily.
How far do you think this move can go? Let’s talk in the comments.
$BTC #BinanceSquare #BTC #ETF #机构资金
