Selling Garnacho would be possible in the future, Amad Diallo likewise but Kobbie Mainoo? Knock it off already ( That's a Goddamn Manchester United legend ).
I hope they keep Garnacho for long years. He is taking Ronaldo as an example and he is really talented. I believe he is also the future of Manchester United.
One day it would of course be possible to sell him just as they have done with Ronaldo. But it can be a record sale at the same time. He is only 20 and has many years ahead to improve his game much more. As for Mainoo he is also brilliant, a 19-year-old big talent. I always admire Manchester United youth setup. There have been so many talented players growing out of there.

These players deserve the attention a lot.
Yes, in fact it has become a problem within the Argentina national team, some see it as a lack of respect towards Messi that an Argentine takes CR7 as an example and not Messi, but I say that everyone has their own way of thinking, their idols and their role models to follow, I think that a player, as long as he is good and contributes to the team by scoring goals, for me that is enough, but of course sometimes the demands can be totally different from what one thinks, but Argentina has a great team, they can do whatever they want, they are the best team in South America so far, of course it seems to me that is the case.