And if you pick the ashes up you still can’t earn from me
Big Sean doesn’t want anyone making money off of him, but himself. So in the line above he says “burn” money he doesnt actually mean light it on fire but rather to spend it or throw it in the around. He puts a play on the word “burn” saying that even if you tried picking up all the money on the floor(ashes) from him throwing it around, you still wouldn’t profit off him.
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