I looked up the original article. Has anyone tried this?? Sounds interesting. I assume the same concept works for any currency that has wallet software that could be downloaded onto the USB. How safe is this, I suppose much moreso than an online wallet but you are still susceptible to keyloggers for your password? Also, are there wallet software that use 2 factor authentication with an authenticator app (which is still susceptible if your device with the authenticator app is lost or stolen).

Interested in feedback.