And I rarely get credit so I keep cash with me

from Wale (Ft. Kingpin Slim & Torae) – Sharp Lyrics on Rap Genius

Meaning

People rarely give him enough credit or praise; he’s underrated.

Also, the word play is “credit”. If you don’t have credit (ie, credit cards or loans), you pretty much have to pay with cash. Hence, he makes sure to have cash.

He also carries cash as a status symbol.

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