Any device designed for Bitcoin users has strong incentives to operate maliciously—whether it’s a watch, a hardware wallet, a software wallet, or a dildo.

In this regard, Greg Maxwell is right: use general-purpose hardware and software that has been reviewed by thousands of pairs of eyes, such as Bitcoin Core.

But this means you’d have to use at least a 2-of-3 scheme with four computers—three of them offline—and digital backups. Plus, the computers should be from different manufacturers and run different operating systems.

99.99% of the people in this space wouldn’t even know where to start, and I could start teaching courses and make a fortune 😂.