At first glance, it’s not so easy to identify the common thread within the Rich Forever crew. Famous Dex is a heavily tattooed Animaniac of a rapper who’s made his name as an on-the-margins presence within both Chicago drill music and the era of SoundCloud-born rap superstars. Brooklyn MC Jay Critch is the voice of an under-regarded and underserved arm of NYC rap. And then there is Atlanta-hailing label head Rich The Kid, the platinum-selling and charmingly mush-mouthed MC who first broke out as an avid skater and an even more avid flexer. The three are indeed from very disparate worlds. But they use the Rich Forever 4 compilation to remind us at every opportunity that money is the tie that binds. Rich The Kid distills their connection best on “Flex Up,” rapping, “Too much money, I can’t count it/That’s the Rich Forever way.”