Pretty poor advice even in jest
Not at all. My position is one of realism.
You can buy all the equipment under the sun, whether it be first-aid, the latest waterproofs etc - but the likelihood is someone will simply overpower you and take what you have.
If there's any doubt to this, look at any war-torn country - or ask someone what happens on the ground during times of lawlessness.
The best thing to have is knowledge, not a check-list of gear.
If society collapses, you'll likely be attacked. There won't be idylls consisting of certain members of society with similar views on utopia.
Rape, pillage & murder will be flavour of the month in the scenario mentioned.
- EDIT - In the specific scenario you mention (i.e. terror attack), you'll be near shops. So my point stands RE carrying some change.
In the greater scenario (i.e. societal collapse), my point also stands.
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