Bitcoin Price Breaks $78,500 as Polymarket and Fed Futures…

Updated 8 September 2026. Bitcoin trades at $78,393, down 1.60% over 24 hours, per CoinGecko at 06:43 UTC, with Coinbase quoting $78,427 and Binance $78,426 in the same window. BTC opened the session near $79,680 and has spent the morning within about $70 of its 24-hour low of $78,357.

Verdict: the $78,500 shelf that held through last week is gone, and the two things that decide the next leg are both dated. August CPI lands Friday 11 September at 08:30 Eastern, and the FOMC decides on 16 September. Those two markets do not agree on the outcome: fed funds futures put a hike near 58%, Polymarket puts it at 51.5%. That gap, not the chart, is the trade.

Bitcoin (BTC) has slipped below the level it defended all of last week. The coin changed hands at $78,393 at 06:43 UTC on Tuesday 8 September, down 1.60% over 24 hours, according to CoinGecko. Three other venues agreed within $40 inside the same five-minute window: Coinbase at $78,427, Binance at $78,426 and Kraken at $78,388. Binance data puts the session open at $79,680, the 24-hour high at $79,691 and the low at $78,357 – so BTC is sitting on the floor of its own range rather than bouncing off it.

That matters because $78,500 was the line. Bitcoin topped $81,272 on 3 September, failed to hold $80,000, and has been grinding lower since. The $76,000-$78,500 band was the last support zone technicians were pointing at before the deeper levels open up.

The Number the Price Widget Cannot Show You

If you searched “bitcoin price” this morning, a widget gave you $78,393 and told you nothing. Here is what it left out.

The single biggest input into Bitcoin’s next two weeks is whether the Federal Reserve raises rates on 16 September, and the two largest markets pricing that question disagree with each other.

On Polymarket’s “Fed Decision in September?” event – $103.4m of volume across its five outcomes – the book read as follows when we pulled it from the gamma API at 06:40 UTC on 8 September:

+25bp hike: 51.5%
No change: 47.5%
+50bp or more: 0.55%
-25bp cut: 0.45%
-50bp or more: 0.15%

That is barely off a coin flip. As recently as 13:07 UTC on 7 September the same book was an exact 49.5% / 49.5% dead heat between “no change” and a 25bp hike. The hike side has crept ahead by four points in under a day, and it has done so with real money behind it.

Now the other market. Investing.com’s Fed Rate Monitor, which derives probabilities from CME 30-day fed funds futures, was updated at 02:25 Eastern on 8 September and showed a 58.4% chance of the target range moving to 3.75%-4.00% against 41.6% for holding at 3.50%-3.75%.

Read those side by side and the point is obvious: futures traders think a hike is roughly a 6-in-10 event, prediction-market traders think it is close to a coin flip. Both readings were taken within four hours of each other on the same morning. Neither is “the market’s view” on its own – which is exactly why you should never quote one implied probability as if it were settled.

The Two Dated Events That Resolve It

Everything between now and the decision runs through two calendar entries.

Friday 11 September, 08:30 Eastern: August CPI. The Bureau of Labor Statistics lists the August Consumer Price Index for release on 11 September at 08:30 a.m. on its own news-release schedule. It is the last inflation print the FOMC sees before it votes.

Tuesday 15 to Wednesday 16 September: the FOMC meeting, with the statement at 14:00 Eastern on the 16th.

A hot CPI print pushes both of those probability books toward the hike and, on the last two months of price action, pushes Bitcoin down with them. A soft print does the reverse. There is no third path in between – which is why the market has stopped trending and started waiting.

Where Strategy’s Cost Basis Sits

One useful, non-technical level: the largest corporate holder of Bitcoin is now underwater on its newest purchase.

Strategy disclosed on 31 August that it had bought 4,603 BTC for $369.7m at an average price of $80,318, ending a roughly ten-week pause in accumulation. That takes the company to 845,050 BTC at an average cost of $75,412.

Both numbers are levels worth marking:

$80,318 – the newest tranche’s cost basis, and almost exactly the $80,000 shelf Bitcoin has now failed at twice. Spot is about 2.4% below it.
$75,412 – the whole 845,050-coin stack’s average cost. Spot is still roughly 4% above it, so the position as a whole remains in profit.

This is not breaking news and it is not a catalyst. It is a marker: the most price-insensitive buyer in the market paid up near $80,318, and the market has not been willing to follow it there.

ETF Flows Are Not the Problem

The tempting explanation for a 1.6% down day is that institutional demand has rolled over. The flow data does not support it.

US spot Bitcoin ETFs took in roughly $986.7m in net inflows in the week ending 4 September, according to Farside Investors data – about 6.7% more than the prior week’s $924.5m. The week was choppy rather than one-directional: about $216.7m in on 31 August, a $236.5m net outflow on 1 September (BlackRock’s IBIT -$201.2m, Fidelity’s FBTC -$43.7m, Bitwise’s BITB +$8.4m), then $101.1m, $730.8m and $174.6m across 2-4 September. The 3 September session alone was roughly three-quarters of the week’s total, with IBIT taking about $454m of it.

So spot fell while the ETF complex was buying. That points at the macro bid, not at a demand problem, and it is the main reason to treat the current drop as a rate-repricing rather than a structural unwind.

Scenarios Into the FOMC

Levels below are drawn from published analyst work, not from our own charting. Spot reference is $78,393 at 06:43 UTC on 8 September.

Case	Level	Anchor	What has to happen
Bear	$72,300	200-day EMA near $72,327; Bitget Research chief analyst Ryan Lee flags $75,000-$76,000 as the main pullback zone first	Hot CPI on 11 September, hike confirmed on the 16th, and the $76,350 cost-basis support gives way
Base	$76,350	Bitfinex Alpha‘s True Market Mean, the on-chain aggregate cost basis	BTC keeps chopping in the $76,500-$79,500 range until the Fed actually votes
Bull	$86,000	Top of Glassnode‘s $81,000-$86,000 supply zone; Ryan Lee’s $82,000-$87,000 target on a clean break of $80,000	Soft CPI, the Fed holds, and BTC clears the $80,800 cost-basis level and the $82,300 gamma flip

Levels via The Crypto Times, 4 September 2026, citing Bitfinex Alpha, Glassnode and Bitget Research.

Note what the table says about the shape of the risk. The bear case is about 7.8% below spot; the bull case is about 9.7% above. That is close to symmetric, which is another way of saying the market genuinely does not know – the same message the 51.5/47.5 Polymarket split is sending.

Quick Take

Bitcoin at $78,393 is not a story about Bitcoin. It is a story about a 25bp decision that two large, liquid markets price four to seven points apart, and about two dates – 11 September CPI and 16 September FOMC – that will collapse that disagreement one way or the other inside six trading sessions. ETF flows were positive through the drop. Strategy’s newest cost basis sits above spot. The support that failed this morning, $78,500, is now the first thing bulls have to reclaim.

What Would Change This View

Three things would invalidate the framing above, and they are worth writing down in advance:

A daily close back above $80,318. That reclaims Strategy’s newest cost basis and the shelf BTC has failed at twice, and it would put Glassnode’s $81,000-$86,000 supply zone back in play regardless of what the Fed does.
A sustained break of $76,350. Bitfinex Alpha treats that as the aggregate on-chain cost basis. Below it, the average holder is underwater and the 200-day EMA near $72,327 becomes the reference rather than the tail risk.
The two probability books converging. If Polymarket and fed funds futures both move to 70%+ on a hike before CPI, the event risk is largely priced and the CPI print itself matters less than it does today.

Frequently Asked Questions

What is the Bitcoin price today?

Bitcoin traded at $78,393 at 06:43 UTC on 8 September 2026, down 1.60% over 24 hours per CoinGecko. Coinbase quoted $78,427, Binance $78,426 and Kraken $78,388 inside the same five-minute window. Binance’s session low was $78,357 and its high $79,691.

Why did Bitcoin fall below $78,500?

There was no single Bitcoin-specific headline. The move tracks a repricing of September Federal Reserve odds: market-implied probability of a 25bp hike has been climbing for two weeks and now sits at 51.5% on Polymarket and 58.4% on fed funds futures. Higher policy rates are a headwind for non-yielding assets, and BTC has traded with those odds rather than against them since late August.

Will the Fed raise rates in September 2026?

Nobody knows, and the two biggest markets pricing it disagree. As of 8 September, Polymarket had a 25bp hike at 51.5% against 47.5% for no change; CME fed funds futures, as shown on Investing.com’s Fed Rate Monitor, had a hike at 58.4%. Both are probabilities, not forecasts. The August CPI print on 11 September is the last major data input before the FOMC votes on 16 September.

What are the key Bitcoin support levels right now?

Published work points at three: $78,500 (the shelf that broke this morning, now resistance), $76,350 (Bitfinex Alpha’s True Market Mean, the on-chain aggregate cost basis) and roughly $72,327 (the 200-day EMA). Bitget’s Ryan Lee identifies $75,000-$76,000 as the primary pullback zone in between.

Are Bitcoin ETFs selling?

Not on the latest full week of data. US spot Bitcoin ETFs took in about $986.7m net in the week ending 4 September per Farside Investors, up from $924.5m the week before, with a single $730.8m inflow day on 3 September. There was one outflow session (1 September, -$236.5m). Flows have been positive while spot has fallen, which argues the drop is macro-driven.

Is Strategy still buying Bitcoin?

Yes. Strategy disclosed on 31 August that it bought 4,603 BTC for $369.7m at an average of $80,318, ending an approximately ten-week pause. Holdings stand at 845,050 BTC at an average cost of $75,412 – so the overall position is in profit at current prices, while the newest tranche is not.

What happens to Bitcoin if CPI comes in hot on 11 September?

A hotter-than-expected August CPI would push both probability books further toward a hike and, on the pattern of the last month, pressure BTC. The levels that would come into focus are $76,350 first and the $72,300 area beneath it. A soft print does the reverse and puts the $80,318-$81,000 zone back in play. Neither outcome is a given, and the size of the move depends on how much of it is already priced by Friday morning.