Crypto prices weakened sharply through overnight trading and into the U.S. session on Sept. 10 as Brent crude rose to $106.83 a barrel, long-dated Treasury yields climbed to multi-year highs, and traders lifted the implied odds of a 25-basis-point Federal Reserve rate increase at next week’s meeting to 63.5%-64%. Bitcoin changed hands at $77,120, down 2.1% over 24 hours, while ether fell to $2,448.88. Across the 125 largest non-stablecoin tokens, 103 were lower at a 1:10 p.m. ET snapshot. The move came after U.S. producer prices for August rose 0.4% month over month, with final demand prices up 5.4% from a year earlier. Bond yields rose in tandem, spot bitcoin ETFs posted two straight days of outflows, and DeFi total value locked slipped to $87.13 billion. The session also showed sharp dispersion beneath the headline sell-off, with ETHFI rising after a previously approved buyback proposal and LAPTOP plunging 64.9% on the day.

BlockBeats reported on Aug. 20 that Coldcard has released firmware 5.6.1 for Mk4/Mk5 devices and 1.5.1Q for Q devices. The update follows an emergency fix on July 31 and three weeks of security review, with the main focus on risks tied to a prior seed-phrase generation attack. Coldcard says each newly generated seed phrase must now include at least one user entropy source, and affected users should update first, generate and verify a new seed phrase, then migrate funds to a new wallet. The company also urged Mk4, Mk5 and Q users to verify the firmware signature before installing the update.

Coldcard has released firmware 5.6.1 for Mk4 and Mk5 devices and version 1.5.1Q for the Q model, following a three-week security review after an emergency fix. The update is aimed at reducing the risk tied to a previously disclosed mnemonic-generation attack. Under the new rules, every newly generated seed phrase must include at least one source of user-provided entropy, either through at least 65 irregular key presses, 50 physical dice rolls, or 128 physical coin flips. That input is then combined with fresh entropy from STM32 TRNG, SE1, and SE2. The firmware also adds staged PSBT verification immediately before signing, tightens USB connection and firmware-update boundaries, improves Delta Mode isolation, fixes an active wallet backup issue, strengthens random number generator initialization and fault checks, and changes the default SIGHASH setting. Coldcard said the release is meant to cut the risk of device compromise. The company also warned that updating firmware does not repair seed phrases created by affected older firmware. Users covered by the security notice are advised to update first, generate and verify a new mnemonic, then move funds to a new wallet. Coldcard recommended that all Mk4, Mk5, and Q users update promptly and verify firmware signatures before installation.

Hashi’s testnet on Sui has drawn participation from more than 25 institutions in a push to let Bitcoin take part in DeFi without leaving the Bitcoin network. The article argues that the market debate has shifted: the question is no longer whether BTC should be programmable, but where that programmability should sit. Hashi keeps the underlying BTC in 2-of-2 multisig Bitcoin addresses while execution happens on Sui, a setup the author says improves asset safety but still leaves users relying on two systems at once. Against that backdrop, TuringBitChain, or TBC, is presented as a different route. Rather than splitting assets and contract logic across chains, it says it writes Turing-complete smart contracts directly into the UTXO model at Layer 1. The piece contrasts the two approaches across trust assumptions, architecture, performance claims, developer trade-offs, and institutional readiness, framing the broader contest around whether programmable BTC finance will be built through external execution layers or within UTXO itself.

Hashdex has announced the closure and liquidation of its Hashdex Bitcoin ETF, ticker DEFI, making it the first U.S. spot Bitcoin ETF to formally wind down. As of July 30, the fund had about $14.7 million in assets under management and held roughly 225.58 BTC. The final trading day is set for Aug. 17, after which the product will be delisted from NYSE Arca, and cash liquidation distributions to remaining shareholders are expected around Aug. 28. The fund began trading in September 2022 as a Bitcoin futures ETF before converting to a spot strategy in March 2024 after the U.S. Securities and Exchange Commission approved 11 spot Bitcoin ETF applications in January that year. Despite posting cumulative performance of about 166% since inception, DEFI never scaled meaningfully, with assets peaking at roughly $17.54 million. The article also examines the sharply concentrated structure of the U.S. spot Bitcoin ETF market, where the five largest funds account for almost all assets, and explains why management fee income at DEFI’s size was far below the level needed to cover custody, compliance, audit, market-making, listing and administrative costs.

A new Bitcoin Security Consortium backed by BlackRock, Coinbase, Strategy and six other firms has pledged a combined $15 million over three years to support Bitcoin security research and open-source development focused on quantum-computing defense. According to Decrypt’s Morning Minute newsletter, the group includes Anchorage Digital, ARK Invest, Block, Blockstream, Fidelity Digital Assets and Galaxy. The consortium will not pool or allocate the capital itself. Each member will directly choose which developers and researchers to fund, while Brink’s Mike Schmidt will coordinate on a volunteer basis. The group also said it will not direct Bitcoin development or take positions on protocol changes. BlackRock digital assets head Robert Mitchnick said Bitcoin Core developers do “incredibly important work,” adding that the effort would expand available funding for Bitcoin’s long-term security. Decrypt also highlighted the scale of the issue the industry is trying to address. While no quantum computer can break Bitcoin cryptography today, about 6.9 million BTC, valued at roughly $450 billion, sit in addresses that would be vulnerable if that changes. The newsletter said proposals such as BIP 360 and post-quantum signature schemes are already being discussed because any upgrade would require years of coordination across wallets, exchanges, miners and users. The same Morning Minute also covered softer ETF flows, CLARITY Act timing risk, MoonPay’s Discover partnership and meme coin volatility.

Crypto prices fell sharply in a broad sell-off, with Bitcoin at $70,427.61 and Ethereum down 6.2%. While major coins declined, several smaller tokens posted double- and triple-digit gains.

Crypto prices moved in different directions today, with Bitcoin down 0.8% to $67,803.91 and Ethereum up 1.0% to $2,001.27. GRX and ISLM led smaller-cap gainers, while Solana fell 1.9%.