Trezor warns Bitcoin as ‘just an ETF’ could centralize custody

A Trezor executive recently warned that framing Bitcoin as ‘just an ETF' could shift control of large holdings to custodial providers and reduce incentives for users to hold private keys directly.

The comments responded to market discussions about exchange-traded products and their effect on Bitcoin ownership. The executive argued that when investors gain exposure through funds, custody rests with those providers rather than individual holders.

Trezor makes hardware wallets that store private keys offline. The company has built its position around the idea that direct ownership of Bitcoin requires control of private keys.

The executive outlined practical differences between holding ETF shares and holding Bitcoin in a personal wallet. ETF investors depend on fund administrators, custodians and exchange infrastructure for redemption and settlement. Direct holders are responsible for protecting private keys and signing transactions.

The executive warned that greater reliance on custodial products could concentrate large balances among a small number of custodians and intermediaries, increasing counterparty and regulatory risk for people who expect direct ownership.

They also raised regulatory concerns, saying concentrated custody could make enforcement or seizure actions easier to execute against a few large custodians than against many dispersed private holders.

Industry flows show spot Bitcoin ETFs have attracted institutional capital and driven inflows. The executive noted those funds lower barriers to market entry but said they can change investor behavior around self-custody and use of hardware wallets.

Trezor continues to offer hardware wallets and educational materials for users who choose to manage their own keys. “Reducing Bitcoin to a conventional financial product risks undermining self-custody, decentralization and censorship resistance,” the executive added.

The company's comments contribute to an ongoing debate within the crypto ecosystem about how mainstream financial products should coexist with practices that preserve Bitcoin's technical and governance characteristics.