aes256-offline VS TordlWalletProtocols

Make a hidden Veracrypt vault on cold computer. Inside the Veracrypt vault save Keepassxc vaults. Store your seeds inside the Keepassxc vaults. For a paper backup, encrypt your seeds using an offline AES256/512 text encryptor/decryptor. Encode the encrypted text using an offline qrcode generator. Print out the qrcode. Test recovery using a dummy wallet. Be sure you can scan and decrypt. Bonus: Laser etch the qrcodes on metal plates. Make a multi-factor recovery vault, in case you forget your passwords. Shimar's secret sharing scheme is a useful tool for making your recovery vault. Never store your seed unencrypted anywhere, ever. Never input your seed on an online computer, ever. Always protect your seeds with something you know (password), something you have (vaults and keyfiles). Do not upload your vault to the cloud. Keep backups in multiple locations. Necessary tools: Cold computer: Any old computer will do. Just physically disable network access. Veracrypt: https://www.veracrypt.fr/code/VeraCrypt/ KeepassXC: https://keepassxc.org/ Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/ Cross-platform, open source QR code generators: https://kazuhikoarase.github.io/qrcode-generator/js/demo/ https://github.com/amanuel/JS-HTML5-QRCode-Generator https://github.com/nayuki/QR-Code-generator Shamir's Secret Sharing: https://github.com/paritytech/banana\_split

Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/

Necessary tools: Cold computer: Any old computer will do. Just disable network access. Veracrypt: https://www.veracrypt.fr/code/VeraCrypt/ KeepassXC: https://keepassxc.org/ Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/ Cross-platform, open source QR code generators: https://kazuhikoarase.github.io/qrcode-generator/js/demo/ https://github.com/amanuel/JS-HTML5-QRCode-Generator https://github.com/nayuki/QR-Code-generator Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/ Shamir's Secret Sharing: https://github.com/paritytech/banana\_split

I really recommend you read a well designed guide for storing bitcoin like The Tordl Wallet Protocols. It gives very helpful guideance on how and why store your bitcoin in certain ways.

I highly recommend you follow a guide like The Tordl Wallet Protocols which are holistic guides to storing your bitcoin. They include guidance on inheritance that will make it so your wife can access your bitcoin - in the worst case scenario with help she is informed to be careful about.

Coldcard works great. Tho I'm pretty disappointed coldcard renegged on having its firmware open source. I might recommend that if you have multiple types of hardware wallets, you might want to consider a multisig wallet that incorporates your ledger and your coldcard. The Tordl Wallet Protocols have holistic guides on how to do that. A ledger+coldcard multisig wallet is far far more secure than a single-sig wallet of any kind.

While you're thinking about ways to level up, you might be interested in reading through some of The Tordl Wallet Protocols, a holistic set of guides for how to securely store your bitcoin. Its got info in there about multisig bitcoin storage, inheritance, and other nice info. Coldcard is nice, but if you really want to elminate all single points of failure, you need to go multisig. If you have more than $5000 in bitcoin, I'd recommend thinking about it.

Muun doesn't seem to have very clear documentation, but it definitely supports Trezor at least. I'd definitely recommend you upgrade your security using a hardware wallet. The Tordl Wallet Protocols are a good resource for that.

First of all, yes, the largest thing you didn't mention is legal transfer of your Bitcoin. I'm many jurisdictions, a holographic will is probably your easiest solution to this (tho not all jurisdictions recognize them, so check). I'd recommend reading the inheritance guidance in the Tordl Wallet Protocols.

You should first study methods that security experts have developed and published. A good resource for everyone is the Tordl wallet protocols: https://github.com/fresheneesz/TordlWalletProtocols

Definitely record where you've put any wallet information where your heirs can access it. Definitely use a metal plate for your seed. Its pretty cheap generally too (eg the blockplate or steelwallet)

You could also go full self-custody by following a guide like The Tordl Wallet Protocols.

I like electrum on desktop (lots of nice featuers and battletested) and Phoenix as a mobile lightning wallet. If you're trying to figure out a good way to self-custody I'd recommend checking out The Tordl Wallet Protocols - holistic guides to how to self-custody your bitcoin.