A project called Shift has already taken a stab at this idea and is very successful. Shift has been proven to be a very dependable tool to use to buy goods in fiat currencies by instantly converting Bitcoin. Shift connects with a Coinbase wallet and costs $10 USD up front for the card with no transaction fees. The only thing that needs to be improved upon is the lack of an EMV chip. Its exciting to see more projects to be created to give consumers more options!