According to the latest reports, Kane says that he's happy at Spurs and that he's willing to sign a new contract there.
He's probably evaluating his options - there aren't many clubs that can go for him. City got Haaland, in Madrid it would be difficult to pair him with Benzema, Barcelona doesn't have enough money..
Staying looks like a decent option, Tottenham is a good club. Still - if he extends he'll basically spend his whole career there and he's an elite player that deserves to fight for trophies. He will be 29 next month and still hasn't won a single one.
This will be a very good decision for him to stay at Tottenham, since he has already became an idole in the club, he is one of the great strikers Tottenham has, so he should stay with them and sign more contracts, when another offer better than Tottenham come his way then he should live because as a player like him, he needs trophy.