Bloomberg Intelligence senior ETF analyst Eric Balchunas said on Aug. 2 that the Coldcard security failure strengthens the case for U.S. spot Bitcoin ETFs, especially for investors who want long-term price exposure without managing private keys.
Summary
- Galaxy traced 1,367.05 BTC across 4,585 addresses, valuing observed Coldcard losses near $88.6 million total.
- Balchunas argued institutional custody makes Bitcoin ETFs preferable for investors seeking only long-term price exposure.
- ETF investors avoid seed management but surrender direct ownership, payments, and round-the-clock Bitcoin network access.
His comments followed Galaxy Research’s estimate that three suspected attack waves drained 1,367.05 BTC, worth about $88.6 million, from 4,585 addresses.
Balchunas wrote, “Yes, an ETF fixes this,” while noting that some self-custody advocates dismiss the funds as “paper bitcoin.” That is his view on custody, not evidence that investors have moved money into ETFs because of the incident. U.S. markets were closed when he posted the weekend comments, leaving no verified post-comment fund-flow reaction.
Coldcard drain renews the Bitcoin ETF argument
Block’s Bitcoin engineering team found that a firmware integration error routed random-number generation through a deterministic MicroPython fallback instead of the intended hardware source. Its report said Mk2 and Mk3 devices on vulnerable firmware added no cryptographic entropy through that path. Later models used a limited secure-element reseed.
Coinkite’s security advisory covers Mk2 and Mk3 firmware from version 4.0.1 through 4.1.9, plus seeds generated on Mk4, Mk5 and Q devices before their fixed releases. The company released corrected firmware, but warned that updating software does not repair seeds created earlier. Users must generate a new seed and move their funds.
Galaxy’s latest estimate covers three suspected draining waves. The third removed 207.7294 BTC from 1,912 addresses and followed a different transaction pattern. Galaxy called $88.6 million its “estimated observed size,” meaning the figure remains an on-chain estimate rather than a final total confirmed by Coinkite or law enforcement.
Balchunas also questioned whether a reportedly small hardware-wallet company should protect life-changing sums. He called the reported staffing level “a red flag.” Coinkite has not publicly confirmed the headcount cited in his post, and company size alone does not establish whether a security system is adequate.
U.S. spot Bitcoin ETFs remove seed-management risk
A spot Bitcoin ETF removes the investor from seed creation, firmware updates, backups and wallet migration. The fund and its service providers manage those duties. BlackRock says its iShares Bitcoin Trust ETF, or IBIT, simplifies the operational and custody work involved in holding Bitcoin directly. IBIT reported $46.52 billion in net assets on July 31 and charges a 0.25% sponsor fee.
IBIT’s SEC filing says Coinbase Custody holds the trust’s private keys in segregated cold-storage wallets. It also names Anchorage Digital Bank as an additional custodian that BlackRock may use. The filing describes limited employee access, external control reviews and a process in which no single custodian employee has access to complete private keys.
Fidelity uses Fidelity Digital Assets to custody Bitcoin for its Wise Origin Bitcoin Fund. Such products let U.S. investors gain exposure through brokerage, trust and tax-advantaged accounts without operating a hardware wallet. That can matter to advisers and retirement investors who only seek price exposure.
However, the term “regulated ETF” needs context. IBIT is an SEC-reporting, Nasdaq-listed product, but BlackRock states that the trust is not registered under the Investment Company Act of 1940. It therefore does not receive every protection that applies to conventional registered mutual funds and ETFs.
Bitcoin ETFs transfer custody risk instead of erasing it
The ETF structure replaces individual seed risk with institutional custody, operational and counterparty risk. IBIT’s annual filing warns that hackers, employee misconduct, technical failures or unauthorized transfers could still cause losses. It also says Coinbase’s shared insurance may be insufficient for every possible event.
The filing states that shareholders cannot bring direct claims against the Bitcoin custodian under the custody agreement. No party guarantees all trust assets or service-provider obligations. These disclosures do not show that ETFs are less secure than personal wallets. They show that the risk moves to institutions and contractual arrangements.
ETF shareholders also own securities rather than spendable Bitcoin. IBIT shares trade on Nasdaq, and redemptions occur through authorized participants in baskets of 40,000 shares. Retail investors cannot withdraw ETF holdings to a personal address, make Bitcoin payments or transact whenever the network is open.
As previously reported in crypto.news’ Bitcoin ETF explainer, the wrapper offers easier access and professional custody but removes direct ownership and 24/7 use. In related coverage, a technical review of the Coldcard bug found that the failure involved seed generation rather than phishing or physical theft.
The $89M drain is not yet an ETF inflow catalyst
Balchunas’s argument may appeal to investors who only want Bitcoin’s price performance. The incident may also encourage holders to divide funds among personal wallets, multisignature setups and regulated custodians instead of relying on one device or provider. These remain possible responses rather than confirmed investor behavior.
Still, no verified data shows that the Coldcard drain has created new Bitcoin ETF demand. BlackRock’s latest official figures cover July 31, before Balchunas’s Aug. 2 comments. IBIT’s NAV fell 2.78% that day, but the move cannot be tied solely to the wallet incident.
The next U.S. trading session may show whether ETF flows change, although one day of activity would not prove a connection. Bitcoin prices, economic conditions and portfolio rebalancing also drive fund creations and redemptions.
