Crisis Startup Idea

A discussion of the previous topic prompted me to describe my idea.
The idea of ​​a crisis startup.
That is, a startup that will be popular right now, at the time of crisis.
It's about barter.
More precisely about the mini-barter.
Usually under barter understand the exchange of large quantities of goods (car on the ship)
And it seems to me that the exchange of a bag of potatoes for a head cut, for example, is no less popular now.