There's no "of course" about it. We'd like to think Everton courses through his veins but none of us actually know that. More than one local young blue has happily gone elsewhere for a sniff at a trophy regardless of their childhood allegiances.
I really rate him as a prospect but there are positives and negatives to both options when that kind of money is being offered. Neither is definitively the correct option. If he stays it can't be at the expense of bringing in another player or two and if he goes then the proper work needs to have already having been done on where that money is reinvested and it's not a case of "Here's £50M, now what?" with the deadline looming.