Harry Kane has a good history at Bayern Munich, but they also have to carefully consider Harry Kane's age. If he is old enough, his performance will not be the same as when he was young, so the possibility of scoring a lot of goals will be difficult for Harry Kane to do. I would prefer if Bayern Munich found a new player who is young but has skills like Harry Kane. I am sure there are many easy players who have that kind of potential.
He turns 31 in July next year. This means that he still has 2-3 years at his best. So I think there is still a lot of time Bayern Munich have to maximise Kane's ability. So they do have the opportunity to buy other players in preparation if Kane is injured or no longer productive. So the current condition that may occur is injury, because he always performs optimally. The easiest plan is to give Kane more rest. This can be done by giving minutes not maximum in some matches. That will reduce the working time of the muscles and that seems to be better.
We can't say that yet. Harry Kane is a good palter and even as a 31-year-old player he had good performance in Bayern Munich and any team he played for them. I think Harry Kane can even have the chance to play in older age while being in the good form just like what Ronaldo is doing while is old.
But still, Harry Kane can't be a long-term investment for Bayern Munich.