Shopping carts are good……………for?
I have often looked at them with desire, just because of their obvious utility.
In bad times it will always be useful to have a way to move quantities of material quickly.
However, they seem range limited (local, your homestead). The extended terrain is not generally conducive to smooth rolling castor wheels of small diameter like on these carts. If you can work with metal you can easily cut and rebuild them to a wide variety of other functions. However, the latest designs, like at Target, are all plastic. Metal carts would be more versatile and probably stronger.