The main benefits of Swiss bank accounts include the low levels of financial risk and high levels of privacy they offer. The Swiss economy is one of the most stable economies in the world and has not been involved in any conflicts in hundreds of years. Furthermore, Swiss law requires that banks have high capital requirements and strong depositor protection, which practically ensures that any deposits will be safe from financial crisis and conflict. In terms of privacy, Swiss law prevents the bank from disclosing any information regarding your account (even its existence) without the depositor's permission.

https://www.investopedia.com/ask/answers/08/swiss-bank-account.asp