I think it's about being on ecstasy, because it keeps referring to rolling high, and being on ecstasy is commonly known as "rolling" because of the ups and downs in energy you get. And also, when you come down all you want to do is sleep after you've been awake forever. Like someone else said, maybe hes with a girl and she's not into it anymore and wants to come down, and he's just saying you just have to wait for now ("baby that's all i got").
I think it's about being on ecstasy, because it keeps referring to rolling high, and being on ecstasy is commonly known as "rolling" because of the ups and downs in energy you get. And also, when you come down all you want to do is sleep after you've been awake forever. Like someone else said, maybe hes with a girl and she's not into it anymore and wants to come down, and he's just saying you just have to wait for now ("baby that's all i got").