That’s whats wrong with these niggas they think it’s about shine
You niggas get back to your grind, I think it’s about time

from Big Sean (Ft. Jeezy, Lawrence Lamont & Payroll) – It's Time Lyrics on Rap Genius

Meaning

It’s about making the money, and the success that comes as a reward from putting in work. The cars and jewelry are just symbols of the lavish lifestyle. A lot of people pretend they have the money to live like that, but they don’t, and they spend every last penny to fake it. Jeezy just wants to give you the motivation to work harder.

Kanye said roughly the same thing on Blood on the Leaves:

Two-thousand-dollar bag with no cash in your purse

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