Ethereum’s 72% Rally Doesn’t Put a Bitcoin Flippening Close

Ethereum’s roughly 72% gain over 90 days, compared with Bitcoin’s 42%, is a striking run—but it is not the same as catching up in market value. At the late-September 2026 snapshot, Ethereum’s market cap was about $331 billion versus Bitcoin’s nearly $1.7 trillion, leaving ETH around 5.1 times smaller.416 The rally is better understood as a strong rebound after a deeper decline than as evidence that a “flippening” is close.

A bigger rebound starts from a deeper fall

The comparison depends on the starting point. Reports put Ethereum about 69% below its peak before the rebound, compared with roughly 54% for Bitcoin.530 A larger percentage gain from a lower base can narrow losses without erasing them: ETH’s recent outperformance does not, by itself, establish that its longer-term position has overtaken Bitcoin’s.

The market-cap gap is still substantial

A flippening means Ethereum’s total market value surpasses Bitcoin’s. Based on the reported late-September figures, ETH would need to grow about 5.1 times relative to BTC for their market caps to match, assuming the other asset’s value and relative supplies remained broadly unchanged.416

The ETH/BTC exchange rate offers another way to track relative performance. One late-September report put it near 0.0315.20 At that level, reaching roughly 0.16 would correspond to closing the market-cap gap if the relative supply relationship stayed broadly stable. That is a much larger move than a single strong quarter—and a calculation, not a forecast.

ETF flows show interest, not a settled rotation

Spot ETF flows provide evidence of investor activity, but the picture changes with the measurement window. Bitcoin ETFs drew about $3.8 billion over three weeks from August 18 to September 5, while a report said Ethereum ETF inflows had fallen sharply over a shorter weekly period.1 Later September reporting showed positive inflows for both assets; one monthly tally put Ethereum ETFs at about $445 million and Bitcoin ETFs at about $467 million.3 These snapshots do not establish a durable shift in preference toward ETH.

ETF flows also capture only activity through those products. They can help explain investor interest, but they are not proof that Ethereum’s relative market value will keep rising.

Staking gives Ethereum a different feature—but not a flippening signal

Ethereum offers staking rewards, unlike simply holding an asset that does not pay a staking reward. A source published in July reported about 32% of ETH supply staked and an annual percentage rate around 2.6%; a separate September report also put the staked share near 32%.1827 That feature may matter to some holders, but the reported figures alone do not show that staking is driving the rally or will close the market-cap gap.

What would make the flippening more plausible?

The useful signal is sustained relative strength: ETH would need to keep gaining against BTC, not just post a larger dollar-price rise over one period. Continued demand for ETH through investment products and the Ethereum ecosystem would also matter, but the evidence here is mixed. With Bitcoin still far ahead in market value, three months of outperformance is not enough to call a flippening likely.13416

In short, Ethereum’s rally is notable, but the starting-point effect and the size of the remaining market-cap gap matter more than the headline return alone.