1. Not open source software/hardware
2. No clear commitment to open source software/hardware made
3. Block gets 100% visibility into all transactions due to 2-of-3 multisig architecture
4. No ability to verify addresses or amounts (no screen)
5. Still $150 + shipping w/o screen
"Gets many more people thinking about self-custody in #Bitcoin"
Worth Reading about #Bitkey here: 

Zach Herbert
Block's Bitkey "Hardware Wallet" will Violate your Privacy and Security
Update on November 4, 2025: Bitkey has implemented and is rolling out a new privacy feature called "chain code delegation" that makes it impossible...