It is possible there are private barter type of transactions where an amount of crypto coins/tokens are exchanged for a physical item - like a car or camera.
However, in general the transaction becomes much more difficult to perform if it involves going to fiat currency as a bridge between crypto and the physical item.
The gateways crypto <-> fiat take a percentage of the amount, may not match the market price but inflate it in their favor, use KYC/AML procedure to enroll, and may report transactions to governments.
