U.S. spot Bitcoin ETFs took in $2.95 billion in net inflows over the past 30 days, according to data from SoSoValue, extending their inflow streak to eight consecutive trading days through Monday, Sept. 28, a run that followed a turbulent stretch earlier in the month. The funds, which hold bitcoin directly and trade on U.S. exchanges like stocks, have become a primary channel for traditional investors seeking exposure to the asset, making their daily flow data one of the most closely watched gauges of demand in crypto.

Monday's session was relatively quiet by the standards of the eight-day run, with net inflows of $31.07 million — the weakest single day of the streak. BlackRock once again carried the load, with its IBIT fund taking in $54.84 million, while Grayscale's GBTC lost $23.19 million and Fidelity's FBTC shed $10.90 million.

The strong month marks a sharp turnaround from mid-September. The current run of green days began on Sept. 17, two days after the ugliest session in months: On Sept. 15, Bitcoin ETFs lost $450.4 million, their biggest one-day outflow since June 24, coinciding with the U.S. Senate voting 49-50 against advancing the Clarity Act, a crypto market-structure bill. The bill needed 60 votes to advance, and it fell short. Ethereum ETFs lost another $142.3 million that day.

That entire week was rough for the funds. Bitcoin ETFs netted just $6.2 million over the stretch, their smallest weekly inflow in 141 weeks, after the heavy Sept. 15 outflows set the tone.

Buyers then returned quickly. Sept. 21 brought in nearly $1 billion, the best single day for the funds since October 2025, and another $715 million followed on Sept. 22, extending the rebound into a second day.

The pace cooled after that. Flows fell to $347 million on Sept. 23, $191 million on Sept. 24, and $134 million on Sept. 25, for a weekly total of about $2.4 billion — the biggest weekly haul since October 2025.
The rally also lifted Bitcoin above the average ETF holder's cost basis of $81,722, putting the typical fund investor back in profit for the first time since January. Bitcoin itself was back above $84,000 on Monday.

The streak is long, but it is not a record for the summer. A nine-day run ended on Aug. 28, when the funds saw $201.9 million in outflows after Federal Reserve Chair Kevin Warsh spoke at Jackson Hole, the Fed's annual policy symposium, moving the market as traders attempt to gauge what the Fed will do next with interest rates. A ninth straight day of inflows would match the August run, the longest streak of the summer.

Bitcoin is not the only asset drawing money through these investment vehicles. Ethereum ETFs added $982.5 million over 30 days, including $17.1 million on Monday, per SoSoValue. Solana funds took in $278.2 million over the month, while XRP funds brought in $127.05 million.