The transfer fee bar was set by Neymar at around £196Mil and that was only due to a release clause, which will look like a steal considering he is next in line to carry the torch after Messi and CR something that is going to be priceless. For anyone to even get Levy's interest they would need to offer £250Mil+ for Kane as he is probably 2nd or 3rd in line after Neymar when it comes to producing numbers for the foreseeable future bar injuries, but that applies to every player.
For all the "worried" people about him not getting trophies and his need to go to a big club, there simply aren't any that can afford him or could interest him enough to consider them. Bayern and Juventus simply can't even remotely come close to afford him, because they operate completely differently to other top clubs. Man City is a league rival forcing the price even further up, making it even less likely to happen. Real Madrid and Barcelona look like teams that have a mass appeal that all other teams lack, but they too would struggle to pay his fee, and then we are left with PSG who can afford him, but are in a league I simply can't see Kane drop down to only to get a shot at the CL once a year. The lack of competitiveness simply isn't there to keep him motivated.
He is in a team right now that is as close as you can get to being competitive for trophies as anywhere else bar Bayern, PSG, and to a extend Juventus that cake walk their leagues. He is right now in a perfect environment to thrive and compete in and Spurs and him are on the same trajectory and goals.