What's your most important/valuable file you own and use regularly?

My most important file is an insanely customized, self-compiled binary on Gentoo, embedded with multiple layers of encrypted payloads—using a hybrid of AES-256 and RSA, stored in a hidden LUKS partition on a remote server. The entire setup is wrapped in a fortress of security-hardened CFLAGS, with each layer only accessible via a complex, time-sensitive keystroke sequence using a YubiKey. The system is so finely tuned that it only runs on a specific kernel version optimized for speed and stealth, pivoting through an ever-shifting network of proxy chains. If anyone tries to tamper with it, the dead man's switch wipes everything in an instant. Good luck finding it OP.