Le guy who went to jail (and liked it) I

Le guy who went to jail is dumb as fuck.

Common prison currency is either postage stamps or foil packs of mackerel

Source:https://federalcriminaldefenseattorney.com/prison-life/special-tactics/the-black-market-in-federal-prison/#:~:text=Money is prohibited in federal,for %241 from the commissary.

Another favorite is cigarettes