I'll write down some features I'd like to see in Bitkey:

1- I'd like the Bitkey app to start without showing the balance and transaction history. Why? If someone kidnaps me and forces me to open my Bitkey app, they wouldn't know how many Bitcoins I have. It would be even better if Bitkey started with a wallet other than Onchain, like using the Bitcoin L2 that Lightspark is developing (Spark.info), for smaller transactions.

When starting Bitkey without showing the balance or transaction history, I would have to use the Bitkey device to unlock the wallet and be able to use it.

2- Another feature that I think is super important is: using different fingerprints for different types of locking, for example:

If I use a fingerprint from a specific finger, the wallet would be unlocked showing only a part of my balance, this would be useful if someone kidnapped me and forced me to open the wallet. I would use this specific fingerprint and the person would only see and be able to transfer this small balance. They wouldn't know and wouldn't have access to the entire balance.

If I use this specific fingerprint, it would also activate a security mode that would not allow me to access the full balance for a period of 7 days. This would serve as a security measure to prevent the hijacker from forcing me to access the main wallet if he suspects that there is more balance.

And if I use this specific fingerprint, it could send messages to pre defined contacts a message that I'm in danger and that is a good idea call the police.