What is the best way to sell ethereum and transfer those funds to my bank

I bought some about 5 years ago and am just looking to cash out. What I have on record is a json string with the following structure (values removed obviously). I own two so it would be a large-ish transfer

{ "version": 3, "id": "", "address": "", "Crypto": { "ciphertext": "", "cipherparams": { "iv": "" }, "cipher": "", "kdf": "scrypt", "kdfparams": { "dklen": , "salt": "", "n": , "r": , "p": }, "mac": "" } }