Bitcoin breaks May highs as ETF flows return and $100,000 comes into view

Bitcoin breaks May highs as ETF flows return

Bitcoin has broken decisively above its May highs, climbing to its highest level since February as renewed ETF demand, improving risk appetite and a recovery in broader markets propel the cryptocurrency higher.

Bitcoin briefly reached around $85,300 on 21 September, moving above the previous May peak at $82,293 and extending last week's rally. The move represents an important technical development after Bitcoin spent much of September struggling to overcome the May resistance zone.

The breakout now brings the $90,000 region and potentially $100,000 into focus. A sustained move above the May highs would suggest that the resistance which capped Bitcoin's previous recovery has been overcome, potentially opening the way towards the January high around $97,900 and the psychologically important $100,000 level.

However, Bitcoin will need to demonstrate that the latest breakout can hold. The ability to turn the former resistance around $81,500-$83,000 into support could prove just as important as the initial move above it.

ETF flows return after a volatile September

The latest price advance has also coincided with renewed demand for US spot Bitcoin ETFs, although the flow picture remains considerably less consistent than it was during August.

US spot Bitcoin ETFs attracted approximately $433 million of net inflows on Friday 18 September, led by Fidelity's FBTC, which accounted for around $310.7 million. BlackRock's IBIT attracted another $108.4 million.

The strong final-day inflow was enough to leave the ETFs with a modest $6.2 million net inflow for the week ending 18 September, despite significant withdrawals earlier in the week.

The latest inflow was particularly notable because it followed around $746 million of outflows over the preceding two sessions, showing how quickly ETF demand can change as sentiment shifts.

The September flow picture therefore remains mixed rather than uniformly bullish.

That said, the return of sizeable inflows as Bitcoin moved back above $80,000 provides an important source of confirmation for the rally.

August provided the foundation for the breakout

The recent ETF flows need to be viewed against the much stronger backdrop established during August.

US spot Bitcoin ETFs attracted around $3.52 billion of net inflows during August, their strongest monthly performance of 2026. The funds recorded positive flows on 16 of 21 trading sessions, while Bitcoin rallied by roughly 25% during the month.

Demand was particularly strong during the second half of August, when the ETFs recorded nine consecutive sessions of net inflows between 17 and 27 August.

This momentum continued into early September.

On 3 September, US spot Bitcoin ETFs attracted approximately $730.9 million, their largest single-day inflow since January, with BlackRock's IBIT accounting for around $454 million.

The subsequent deterioration in flows during the middle of September therefore represented a pause rather than a complete reversal of the improvement seen since the summer.

More importantly, the latest $433 million inflow shows that buyers returned when Bitcoin approached the $80,000 area.

ETF flows and price action reinforce each other

The relationship between ETF flows and Bitcoin's price has become increasingly important as the cryptocurrency's market structure matures.

Spot Bitcoin ETF flows are widely used as a proxy for institutional demand because the funds provide regulated access to Bitcoin and generally hold the underlying asset. However, they represent only one part of the market and should not be treated as a perfect measure of total institutional positioning.

The recent data nevertheless provide an interesting pattern.

Heavy ETF inflows in August coincided with Bitcoin's initial recovery. A subsequent period of outflows coincided with the cryptocurrency's failure to sustain gains above $80,000. Now, renewed inflows since 18 September have been followed by a break above the May high.

If ETF demand remains positive following the breakout, it would provide additional evidence that the move above $82,293 is being supported by spot demand rather than being driven entirely by leveraged traders.

Conversely, a return to persistent outflows would make it harder for Bitcoin to maintain its gains.

Macro backdrop remains a key risk

The breakout has occurred despite a challenging macroeconomic backdrop.

The Federal Reserve raised interest rates by 25 basis points on 16 September, its first rate increase in three years, while markets continue to price the possibility of another increase before the end of the year.

Higher interest rates and Treasury yields would normally represent a headwind for Bitcoin by increasing the relative attractiveness of traditional fixed-income assets and tightening financial conditions.

However, the latest move in Bitcoin has coincided with some easing in those pressures.

Oil prices fell around 2% on 21 September, helping push the US 10-year Treasury yield back below the closely watched 5% level. Bitcoin subsequently rose around 4%, while US equity futures also advanced.

The relationship between oil, inflation, bond yields and Bitcoin is therefore likely to remain important.

A sustained decline in oil prices would ease some of the inflation pressure that has been complicating the Fed's policy outlook. Conversely, another sharp rise in energy prices could push yields higher and potentially test Bitcoin's latest gains.

The $100,000 region comes back into focus

From a technical perspective, the break above the May high is the most significant development in Bitcoin's recent recovery.

The $82,293 level had represented the peak of the previous major recovery. Bitcoin's failure to clear it earlier in September resulted in a pullback towards the mid-$70,000s but from there another swift - over 12% - advance has so far taken place.

Bitcoin bullish scenario

Bitcoin's rally to seven month highs around $85,300 is technically significant as the May peak at $82,292.93 has been exceeded. If the cryptocurrency manages to hold above this level on the 21 September, the break above key resistance will be confirmed with the early May highs at $81,255.09-to-$82,292.93 - because of inverse polarity - now expected to act as potential support.

Potential upside targets are at the 25 January low at $86,013.03, minor psychological resistance around $90,000, the January peak at $97,913.08 and the major psychological $100,000 mark.

Bitcoin bearish scenario

Only a bearish reversal and slip through the 20 September low at $80,095.02 would point to a possible false breakout and may lead to a slide towards the 23 August-to-mid-September lows at $76,251.41-to-$74,919.36 occurring.

Short-term outlook: bullish while above the 20 September low at $80,095.02

Medium-term outlook: bullish while above the 15 September low at $74,919.36

Bitcoin daily candlestick chart