The entirety of your fiat and Bitcoin holdings is stored in an account in your name with your custodian. In the unlikely event that Swan Bitcoin ends operations, you still have legal control of funds stored within the custodian of your account. You can continue to custody your Bitcoin with your custodian or you can request disbursement.
As always, we strongly encourage you to withdraw Bitcoin to your own custody. If you are not familiar with self-custody, please refer to our wallets FAQ and related blog post for more information.