First off,
Food is a 'NEED' not an addiction unless you are one of those people that look like a water bed mattress filled with jello!
How's that for a visual!
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Can't really rule all that out in a 'Time Of Need'...
Coffee stores VERY well in sealed containers, especially metal.
Coffee, Coco Beans and Tobacco trade have built empires and were some of the most widely traded commodes prior t the 'Industrial Revolution'.
No reason to think they won't be trade goods in the event of some kind of seriously unlikely total collapse of governments...
Alcohol will always be available simply because it's so easily produced from about any starch bearing plant form.
Tobacco, Marijuana, Mushrooms, and anything else that can be grown locally will always be available.
I'm not saying that you should go out and start growing anything illegal!
I'm just saying that trade, and trade goods, will continue no matter what economies or governments are doing.
If you suspect a spotty supply, or wild fluctuations in price, stock pile some of your favorite things to 'Smooth Out' the supply or market pricing.
What would be in short supply in the event of total economic collapse would be things with finite shelf lives that are hard to produce,
Like Antibiotics, Antidepressants, Lots of the heart and blood pressure medications, Insulin for diabetics, ect.
If there is enough profit in it, SOMEONE will start a trade route to supply it! It's just human nature to do so.