nah not in the slightest, he couldve picked any club in football before choosing us. no reason to think he will leave or be "stolen" in the next 3 years, besides he doesnt seem the type to abandon a project, unlike poch who has previous of leaving a current project to go to a team with more clout so to speak.
i can see why you guys are worried though, the implications of poch going could be disastrous in the time leading up to your new stadium, can you keep your top 5 status if he does go, if not, will you be able to fill 60,000 seats if your sitting in mid table? we could, not so sure you could tbh.