Green’s Dictionary of Slang

coil n.

[? the circular shape of coins, a roll of banknotes; or fig. ref. to the mortal coil, i.e. life and thus money as a basic necessity for life]

(W.I. Rasta) money.

[WI]Francis-Jackson Official Dancehall Dict. 11: Coil a substantial amount of cash: u. to ’ol a coil.