If they were to go through with this, it would mean the end of economic growth, trade, and commerce with the rest of the world. It would be very hard if not impossible to transfer any large sum of money for trade purposes, unless they intend on giving merchants the ability to use the internet exclusively for payments.
In reality though, a modern business is dead on arrival if they can't outside of the country for customers.
In reality though, a modern business is dead on arrival if they can't outside of the country for customers.