Castigo translates to 'punishment'. It's a dramatic and powerful word that adds a dark, poetic layer to the song.
In 'BRUCE WAYNE', Peso Pluma sings, "Sigo vivo, será mi castigo" (I'm still alive, it will be my punishment). He uses this word to express a defiant irony: for the people who wish him ill, his continued life and success is their ultimate punishment. It's a memorable line that turns a negative word into a statement of strength and resilience.
Peso Pluma kicks this song off by painting a scene of pure luxury and success. After staying inside for a while, he's throwing a huge party where girls are dancing so close they almost step on his new Christian Dior shoes. He's not just rich, he's exclusive rich, boasting about wearing a Maison Margiela jacket that isn't even out yet: "Sé que no han visto, pues no ha salido, tengo la colección" (I know you haven't seen it, 'cause it hasn't come out, I have the collection). He's so wealthy he tells people not to even bother sending him the receipts for his trips, luxuries, and cars.
But the whole vibe gets darker. He compares himself to a famous superhero's alter ego, saying "Me siento Bruce Wayne porque en el Lambo ya me han visto" (I feel like Bruce Wayne because they've already seen me in the Lambo). Like Wayne, he's a rich guy who comes out at night, "como un vampiro" (like a vampire), dressed in black. This comparison also introduces a sense of isolation and being misunderstood. He feels the flip side of fame, noting that "Primero te aman y luego te odian" (First they love you and then they hate you). He believes people now wish him the worst, but he's defiant, saying he's still alive and blessed, even suggesting that just continuing to live might be his "punishment" to his haters.