But can't i do the same thing from wherever i am and have it delivered? Or have it mailed as a gift? Even with the situation in Venezuela, Fedex/DHL still ship there.
Furthermore how does that allow you to pay for food, water, utilities, or even fuel for your car?
Do what? Order things with paper money or are you talking about some VISA/MC-backed debit/credit card? Where do you sign up for a USD-based bank account in Venezuela? How do you pass KYC checks? You got a family member or friend who lives in the States you can trust to escrow that for you?
Shipping Fedex/DHL in Venezuela isn't nearly as reliable as shipping in the United States. Nor is it cheap.
Energy and gas are super cheap in Venezuela (38 cents a gallon). I'm not sure where you're going with your argument there.
You can hold crypto as a hedge against the Bolivares, convert to fiat as needed, just like any other fungible asset.