I was really thinking about Yamal being the new Messi and for sure he have everything to be that kind of player but also I think outside the pitch he started to show some pretty bad behavior more similar to Neymar or a Brazilian player than Messi, now that doesn't matter because he is still young but when he start to become old..... It can be a problem.
He has connection with Neymar like friends and his bad habits shown recent months are not too different from Neymar's style. Yamal must stay calm and see how Neymar was recognized as a very promising and talented player years ago, then what he has achieved so far in his career. No Ballon d'Or, no World Cup and his career is falling to downside even he is much younger than Mesi and Cristiano Ronaldo.
Yamal must avoid similar mistakes like Neymar did and must use his talent as best as possible. Only he can maximize his ability by being ambitious and professional, while if he oppositely falls to parties and bad habits, his career will be shorter and also worse than it should be.