The song "castles" by Lil Peep & Lil Tracy is about the struggles and ups and downs that come with fame and success. The artists talk about feeling like they are falling, but still being able to stand strong and overcome the challenges. The lyrics also touch on the theme of luxury and extravagance, with references to Gucci sheets and riding in a black car. However, the song also delves into the darker side of fame, with mentions of drug use and the fleeting nature of relationships. Overall, the song captures the complex emotions and experiences that come with living a high-profile lifestyle.