I think it's a stupid idea, and slowly, he is starting to worry people. At first, he was a kid who liked to party in his free time, like most kids. Fine. Then, he seemed to hit back at the media and showed himself to be a bit petulant on and off the field. Now this. It's not that this is going to destroy his football for sure, but I find the timing a bit irritating.
If you want to do it, just do it and maybe eventually people will come to know you play music. Good for you. Why make public announcements like this immediately after losing a home game to a newly promoted team, where Neymar had a bad game to boot. It's just silly, not well thought of and kiddish. It's almost like hes trying to rebel and show he's above all this crap and that he doesn't care what anyone thinks..