[DanBC]

GP says "they uave no reason to mug me"

Reply says "do the muggers know that? They mug people, and they might not know that an iPhone X is worthless to them"

That's not circular.

[superuser2]

They don't know it now, but eventually people will figure out that they're impossible to fence.

You're lowering the reward while holding the risk constant. As technology makes the street value of stolen items lower and lower, eventually street robbery will be less attractive.