Yes, it is possible to sell a personal wallet for cash. It is also possible to purchase Bitcoins that are physical coins you can hold. Each Bitcoin is worth real digital Bitcoin value according to investment. The physical Bitcoins carry an embedded code on the back so it can be spent over the internet. How much one Bitcoin is worth is entirely decided by free market dynamics within the community. It’s a currency from the people, for the people. Bitcoin is still in its infancy and as the currency progresses there will be more avenues for conversion, including mobile phone applications.