Coinbase CEO Brian Armstrong maintained his forecast that bitcoin could reach $400,000 by 2030. On Sept. 27, the blockchain outlet Cryptopolitan reported that Armstrong reiterated the possibility in a Sept. 19 interview, based on bitcoin's past halving cycles.

Armstrong said the bitcoin network has reduced new supply about every four years, and that sharp rallies and major corrections have repeated after previous halvings. He said bitcoin could rise to about three times its previous record high before 2030. He added that this figure is only a scenario possible if a similar pattern continues, not a fixed target.

Coinbase also added a fixed-rate loan product that allows customers to borrow USDC using bitcoin as collateral. Borrowers can lock in interest costs and the repayment maturity at the start of the loan.

The product operates based on the decentralized lending protocol Morpho Midnight, introduced in July. The protocol does not custody customer funds and provides preset borrowing rates and fixed maturities. Trade settlement takes place on Base, Coinbase's Ethereum-based layer-2 blockchain.

Coinbase currently also offers the variable-rate loan product Morpho Blue. Its interest rate varies depending on liquidity and loan demand. The new fixed-rate product will operate alongside existing services rather than replace them. Active loans in the variable-rate lending market total more than $1.4 billion, with total collateral of about $3.0 billion.

Inflows into U.S. spot bitcoin ETFs also increased. U.S. funds recorded net inflows of $2.4 billion in the week ended Sept. 25. That was the biggest weekly inflow since October 2025. The 12 bitcoin ETFs pulled in $999.0 million on Monday alone. That was the biggest daily inflow since Oct. 6, 2025, and the ninth-largest since trading began in January 2024.

The inflows pushed net inflows for 2026 back into positive territory. Net inflows since the start of the year are about $934.1 million. As of July 13, they were at about $5.8 billion in net outflows. Cumulative net inflows since the ETFs launched are about $57.6 billion, and total net assets are about $108.4 billion. Bloomberg ETF analyst Eric Balchunas pointed to the U.S. Treasury's plan to expand purchases of long-term Treasury bonds as a driver of the trend.