Could you please clarify the process for transferring funds from my cryptocurrency holdings to my bank account?|Is it possible to sell my crypto through an exchange and convert it into cash?|After converting my crypto to cash, how do I access the cash balance in Coinbase?|From my cash balance in Coinbase, how do I initiate a transfer to my bank account?|Is there a specific fee or timeline associated with transferring money from crypto to a bank account?