On September 21, Bitcoin touched $87,392.
The highest point since January 29.
Up more than 50% from $57,803 in July.
Twitter is flooded with posts saying "bull market returns."
But Bitfinex poured cold water: past bear market rallies that didn’t evolve into bull markets also rose 50%.
The increase itself doesn’t prove anything.
What’s truly different is that two signals appeared simultaneously for the first time.
Signal one: ETF single-day net inflow of $999 million.
On September 21, the US spot Bitcoin ETF recorded the largest single-day inflow since October 2025. The next day, another $714.7 million flowed in.
As of September 26, there have been 7 consecutive days of net inflows totaling $2.98 billion. The fund flow since the beginning of 2026 turned positive for the first time.
Signal two: corporate balance sheet buying resumed simultaneously.
Strategy bought 950 BTC from September 14 to 20 at an average price of $79,670. This is the first increase in three weeks.
Strive bought 1,355 BTC in the same period at an average price of $79,475.
Together, the two companies acquired 2,305 BTC in one week.
In the previous three months, all publicly listed companies’ Bitcoin treasuries absorbed only 5,900 BTC in total.
This is no coincidence. ETF and corporate funds formed clear buy orders simultaneously for the first time this year in the same week.
But now, here’s the problem.
The current breakeven point for ETF investors is about $86,000.
Corporate holding cost is about $80,500.
BTC’s latest price is about $84,580.
For the first time this year, ETF investors and corporate holders are both back in profit simultaneously.
This is the real test.
If these funds only buy when the price falls below their cost, they are just "bottom-fishing funds"—buying only on dips and stopping when prices rise.
Only if they continue net buying while already profitable and even as prices rise further, is it true structural demand.
In other words:
Don’t ask if the bull market has arrived. Ask if institutions keep buying after making profits.
$85,000–$86,500 is becoming the new line between life and death.
Previously, $80,500–$82,500 was packed with chips and acted as resistance.
But with recent trading, supply in this area has clearly decreased.
At the same time, a new high-volume cost zone of about 633,000 BTC formed between $85,000 and $86,500, becoming the largest chip concentration band on-chain currently.
Marginal buyers—ETFs and corporations—are building positions above $85,000.
This level is turning from resistance into support.
Holding it means the market accepts higher prices. Breaking below means a pullback after a rally.
On-chain data also speaks.
The proportion of profitable supply rose back to 78.2% on September 22.
In past cycles, 75% was a watershed. Bear market rallies could briefly surpass it but were quickly crushed by profit-taking. After truly entering a bull market, this indicator stays above 75% long-term, approaching 90%.
The first significant pullback is the real test.
When prices fall, can the profitable supply ratio hold above 75%?
If yes, it means new profits are not being cashed out on a large scale. If no, it means this rally is just a sell-off rebound.
Bitfinex’s judgment is cautious: "Currently closer to an early transition phase from bear market to new cycle, rather than a confirmed new bull market."
One last painful note:
Interest rates have not dropped. The 2-year US Treasury yield remains above 4.7%. This rally is not driven by macro liquidity but by money moving within the crypto market itself.
If institutions keep buying after profits, this rally could turn from a "bear market recovery" into a "new cycle."
If they stop, $87,392 will be the ceiling of this rebound.
$BTC$ETH$SOL#BTC现货ETF连续7日净流入近30亿美元
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