Sure, it's a good idea to explore the several possible ways to move your funds to see which one is better for you.
You indeed can deposit crypto to your Advcash account and get fiat balance (sell crypto), or you can convert crypto to a stablecoin or to fiat elsewhere, and then make a fiat or stablecoin deposit.
Besides, our exchange rate really isn't that bad, the Coin Tick app for mac OS shows me $58,750 for 1 BTC at this very moment, while our sell crypto section offers $58,172 which is less than 1%.