No, you cannot change the currency of an existing Atmexx Wallet.
However, you can create a new wallet in a different currency by following these steps:
Log in to your Atmexx Account
On the left panel, click 'Wallets' to be directed to the Wallets page
Click 'Add Wallet' link located below 'Estimated Total'
Select your desired currency (e.g., USD, USDT, BTC)
This allows you to manage multiple wallets in different currencies, each separate and customizable for your funding and trading needs.