Harley is microchipped but I was just wondering how helpful it really would be if he were to go missing.. AKA STOLEN!

Because as far I've been made aware is that they are only scanned if they are brought into a rescue, shelter, humane society etc. So if someone was to steal him it would be no use to me otherwise correct? I WISH that the Avid microchip company had it's own satellite and you could pin point your furbabies location no matter where they were and go rescue them!!