Cause when it comes to money, yo, Grant's my nigga!
from Marley Marl (Ft. Big Daddy Kane, Craig G, Kool G. Rap & Master Ace) – The Symphony Lyrics 1 on Rap Genius
Meaning
Referring to Ulysses Grant (the man on the $50 bill):

“Granted”, if you’re good at what you do, you eventually get a wider fanbase… and more money in the process.
To help improve the meaning of these lyrics, visit "The Symphony" by Marley Marl (Ft. Big Daddy Kane, Craig G, Kool G. Rap & Master Ace) Lyrics 1 and leave a comment on the lyrics box