Asks for more and more ethereum

So when I tried to swap my ethereum for bnb it said add for example 20 dollars more then I add 50 then it asks again.

@KryptoKing1331 Welcome to the Metamask community.
Just to confirm, are you using the Metamask swap feature?
Are you swapping binanced pegged eth for BNB?
Is the amount of BNB you have in your account sufficient to cover the transaction fees?