I've seen the keys of life carried in a briefcase

from Troy Ave (Ft. Pusha T) – Concrete Jungle Lyrics on Rap Genius

Double entendre;

• He’s been carrying around kilo’s (keys) of cocaine in a briefcase

• Once a dealer — always a dealer. The Ankh; An ancient symbol which represented the key of life for ancient Egyptians has the literal meaning of “life” attached to it. Pusha’s saying that becoming and being a drug dealer is your life — it’s never ending.

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