Your selected coin, display currency and transfer network are three different choices. Changing how a balance looks does not swap the assets in your account.
Choose a wallet balance
Open the balance/currency selector in the header or Wallet and select the coin you want to view. Each coin has its own balance. If zero balances are hidden, use the wallet’s visibility option to show them when looking for another currency.
For example, selecting USDT while holding BTC does not convert BTC into USDT. Housebets does not provide an in-account crypto swap.
Change the display
Use the wallet’s fiat-display controls where shown to view an indicative fiat equivalent. Check Settings → Preferences for the preferences offered to your account. A USD or EUR display is a view of value; exchange-rate changes can move that figure without changing the number of coins.
Choose a deposit or withdrawal route
In Wallet → Deposit or Wallet → Withdraw, choose the transfer currency and then a supported network. Do not use your display preference to decide the sending network. Confirm the currency shown inside a game before betting as well.
Follow deposit steps or withdrawal steps for the transfer. Reward-claim currency is a separate preference; check the actual claim screen rather than assuming it follows your wallet display.