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Trezor Chief Commercial Officer Danny Sanders warned that nudging investors to park Bitcoin in spot ETFs instead of holding their own keys would erode the network's core value proposition. Speaking to The Block, Sanders framed ETF-only adoption as the worst-case path for the asset, even as the products have pulled in record institutional flows since launch.
Why it matters
Sanders anchored his argument in a usage gap: roughly 600 million people now sit inside the crypto market, but only about 10% self-custody, and just 12–13 million use hardware wallets. The split matters because the industry's pitch to regulators and skeptics has long hinged on Bitcoin as a bearer asset — one that does not require a custodian. If the next hundred million users default into ETF wrappers, that pitch quietly narrows.
Market impact
The comments land as US spot Bitcoin ETFs approach a year of uninterrupted net inflows and the products' combined AUM pushes toward new highs. Sanders is not arguing against the vehicles — he is flagging that the growth story has a second variable, user behaviour, that the flow headlines do not capture. Watch self-custody onboarding metrics and hardware-wallet shipments over the next two quarters; that is the data point that decides whether his concern stays theoretical.
Frequently asked questions
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What did the Trezor executive say about Bitcoin ETFs?
Trezor CCO Danny Sanders told The Block that steering users into spot Bitcoin ETFs instead of self-custody would be the worst outcome for Bitcoin, arguing the industry should focus on making self-custody easier rather than relying on intermediaries.
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How many crypto users actually self-custody their assets?
Sanders cited roughly 600 million crypto users globally, with only about 10% self-custodying and just 12–13 million using hardware wallets, according to the interview.
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Why is self-custody considered core to Bitcoin's value proposition?
Bitcoin has long been pitched as a bearer asset that does not require a custodian. If users default into ETF wrappers, that property narrows — which is the concern Sanders is raising.
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Do Trezor's comments contradict the spot Bitcoin ETF growth story?
No. Sanders is not arguing against the ETF products themselves; he is flagging that user behaviour — whether new entrants self-custody or rely on wrappers — is a second variable the inflow headlines do not capture.
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What metrics would show whether Trezor's concern is materializing?
Hardware-wallet shipment data and self-custody onboarding metrics over the next two quarters are the cleanest read on whether new users are holding their own keys or defaulting to ETF wrappers.
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