If you wanted to "cash out" you will have to sell your bitcoins (BCH/BTC) on a crypto exchange for local currency. You will then be able to send those funds to your bank account.
There is no option that lets you send bitcoins directly to your bank account, from your Bitcoin.com wallet. Bank don't like bitcoins.
If you wish to sell some or all of your Bitcoin Core (BTC) or Bitcoin Cash (BCH), please check out the following links
The easiest place to sell Bitcoin Cash (BCH) now is on our https://local.bitcoin.com/ site. No KYC is required, and setting up an account will take less than 5min.
Please check out the site and sign up, we even have a referral program.
Instead of going to all the trouble of setting up an exchange account and selling your remaining bitcoins, you could purchase something like some gift cards or just about anything else you might need, if you look...
There really is a lot of neat stuff you can buy with bitcoins now, especially with BCH. As mentioned you can buy gift cards and often get a nice discount: https://giftcards.bitcoin.com/
Purse.io has always been a good site, it allows bitcoin users to get up to 30% off anything sold on Amazon: https://purse.io/shop
There may also be stores locally that accept Bitcoin Cash (BCH) you don't know about yet, check the map here: https://marcocoino.bitcoin.com/
And if it's bitcoin swag you are after, then we have you covered at the Bitcoin.com Stor