Key points for hardware wallets. Buy hardware wallets directly from the official website and flash BTC-only firmware. Split the seed phrase into shards and store them in multiple locations. Set up a passphrase to hide the wallet. The passphrase is randomly generated by the device, entered only on the touchscreen, and backed up on a steel plate in a different location. Keep secrets offline, and only trust the device screen for addresses. Before depositing funds, wipe the device and restore it completely using the backup—practice until you get it right. Ensure no single point of failure, including forgetting yourself, so you don’t lose your coins.