In case of death the box would be automatically transferred for my kid so it would be useful in a way that seed does not get lost when I die.
In case of death, there are better alternatives. IMO, that's the best one:- Create a seed phrase and derive an address.
- Sign a transaction where you send X BTC to your that address and make it valid after block Y.
- Give the signed transaction and the seed phrase to your kids.
If you've passed away before block Y, then they can safely inherit the money by broadcasting the transaction. If you're still alive right before it gets mined, spend the output and redo the above process. No need for banks. Trustlessly.
