Fiat holdings can be withdrawn to a fiat bank account. A fiat withdrawal fee of CHF 20 per withdrawal applies. Read more under the category Deposits & Withdrawals.
There is also the possibility to hold stablecoins on the Bitcoin Suisse Online Account instead of fiat. USDC and EURC holdings are exempt from the crypto custody fee. In case USDC or EURC are held in the Bitcoin Suisse Vault, the Vault custody fee of 0.20% p.a. applies.