Swiss retail customers of the country’s largest cantonal bank now have the ability to buy, sell and hold the two most popular digital assets: bitcoin and Ethereum. ZKB is handling the custody of crypto-assets a service that can be offered to other Swiss banks. The fourth-largest bank in Switzerland, Zürcher Kantonalbank (ZKB), has begun offering retail customers the ability to buy, sell and hold the two most popular cryptocurrencies: bitcoin {{BTC}} and Ethereum {{ETH}}.