It would be very practical and a great security option to have a secure profile that only opens with the insertion of a USB key, similar to the Windows To Go system. If you need access to the secure profile, you insert the key, and in case of imminent danger, you can simply destroy it or discreetly dispose of it. There would be no trace of the profile or its contents as long as the key is not connected.
I'm not sure if this feature already exists, but if it were available, it would solve many problems.