Tekashi 6ix9ine is reportedly working on his next album from jail. Since the release of Dummy Boy, we’ve heard a single musical appearance from Tekashi 6ix9ine in the form of a feature on A Boogie wit da Hoodie’s album. The rainbow-haired rapper is currently locked up on racketeering charges and as he awaits trial and sentencing, he’s keeping himself busy with the pen. According to TMZ, the rapper’s creative …