I think 38 is not a negative for Cristiano. We watched Zlatan again with his good performance at this age. Ronaldo can show this performance in the same way. It just takes a team that believes in it. He was 37 years old last year and had done well for Manchester United. Cristiano Ronaldo probably plans to play football until the age of 40. Later, he can step into his coaching career.
Ronaldo has already said that he believes that 40 years is a good age to retire. I think that this can be regarded as a direct confirmation that he will not end his career earlier.
As for his possible coaching career, I'm not sure about that. He is too ambitious and demanding of himself - if he makes at least 20% of such demands on ordinary players, then this will lead to nothing but conflicts.
Ronaldo is currently in a fairly disappointed condition after failing to bring Portugal to win the world cup, as an ambitious player of course he still has the urge to be able to get a national trophy (world cup) before he retires but for now it seems that the dream has ended, he is getting old old of course will affect his performance and physique a lot so I'm thinking maybe he'll only play 1 or 2 more seasons before he retires, Ronaldo and Zlatan of course we can't equate the two because of course everyone has different physical endurance and I think It's hard to see Ronaldo playing until he's 40 or beyond the way Zlatan did.