What I'm getting at is that attempting to escalate a mugging beyond "I point a gun/knife at you, you give me stuff, I get away as fast as physically possible, I

What I'm getting at is that attempting to escalate a mugging beyond "I point a gun/knife at you, you give me stuff, I get away as fast as physically possible, I fence the stuff you gave me as soon as possible" introduces a lot more risks than what most muggers are willing to bear. Things get hairy very quickly the moment either the mugger or muggee deviates from that script - and forcing the muggee to unlock a mugged device is a rather drastic deviation, especially when the muggee can just as quickly call the police or reboot the phone or otherwise introduce yet more risk for the mugger on top of the existing risk from prolonging the duration of the mugging. Same deal with home burglaries. No burglar in one's right mind is going to give the slightest iota of a rodent's anus about the possibility of there being a Bitcoin wallet and SSH keys on your laptop; most burglaries are smash-and-grab, and are intended specifically to minimize the amount of time spent inside the victim's home. Every second adds risk of complications; unless the burglar is targeting you specifically and knows ahead of time exactly which devices might have valuable data, it's in said burglar's best interests to take the laptop and run rather than spend precious seconds (or worse: minutes) "persuading" you to unlock it.