Tottenham should sell Harry Kane. They might not be able to sell Harry Kane if they demand too high a price. And if Harry Kane leaves the club as a free agent next season, then Tottenham management will suffer financially. Bayern Munich management will probably be willing to spend 100 million on Harry Kane eventually. And even then, if Tottenham management doesn't sell Kane, then they are going to make a big mistake. I don't think any other team will pay more than 100 million.
If you think about the finances of a football club, Tottenham should have sold Kane at this time considering that his contract with Tottenham only has one year left.
When Kane is released on a free transfer, Tottenham will not get any profit and if he sells him there is still a high possibility that Kane's sales budget will be used to take other players who are younger and more talented.
But back to that in reality Tottenham still retain Kane.