I always thought about a digital currency that can be traded only for fiat. Let's say person A buys 1000 coins for 1010 USD (1% commission). Person A send 1000 coins to person B. Person B exchanges 1000 coins for 990 USD (another 1% commission), also person B can use the coins to send payments to others.

That way you can forget about the volatile price of BTC, and the price of the coin itself, because it's traded for a fixed price. Of course there should be a buyer for every coin a seller is exchanging. But if the coin gets more and more attention, this could be huge.

I think Dev’s plan is make money from the exchanging fees.

It should work just like Paypal, Payoneer, Neteller, etc. with the advantage to carry your money in a pendrive. Also you can implement some anonymous features to the wallet itself.

That's what I understand, please tell about pros and cons you see.