I agree, 120M is worth it for Kane, but the article also mentions that "
It is understood that Tottenham Hotspur chairman Daniel Levy will not sell Kane to another English club under any circumstances."
I feel like Levy would let Kane go to clubs like PSG, Real Madrid, Barcelona, at a lower fee (70-90M) if Kane insists on leaving, he won't sanction a move to an EPL team.
in 2010,
Modric signed a 6 year deal with Spurs, and in Aug 2012, he
moved to Real Madrid for £35M, amid interest from Chelsea & United (it was rumored both clubs bid for Modric), Levy demanded £40M for Modric and accepted a lower fee from Madrid in 2012, he might do the same with Kane too.