What do you have in mind for the style and theme of the app?
Generally speaking, the wallet page needs to look like a standalone "app" in its own right, not just another page on the website. I think this includes shrinking the top bar or replacing it with something else. That footer also needs to be replaced with something tiny. We need a minimalist, crisp, responsive interface for the wallet. Scroll bars should not be needed (at full resolution at least). Users need to be able to immediately see the information about the amounts of money they hold in different currencies. There need to be clear action items on the page for the user to launch the "convert" workflow to convert from one currency to another. Same goes for the "Deposit" and "Withdraw" workflows. There should be some delineation (as there currently is, with grayed out cards) for inactive currencies. But honestly I am open to a lot of different designs. I'm leaving things vague and hoping that people with better artistic eyes than me can imagine and then depict what this wallet app/screen should look like. The interface should be beautiful and should make users want to keep staring at it. I want to avoid making it look too much like a "dashboard" (you know all those web templates), but I think a lot of the design aspects from dashboards would probably translate fairly well to the wallet, since the wallet is an app that allows users to manage their money.
The user can go to their 'wallet' page to view all the currencies they have, and the amounts in each. From there, the user can add money to the wallet, exchange money between currencies, and send money to other accounts and people.