what ?

If someone steals your debit card/pin they have access to your current and savings accounts and can withdraw lots of cash.

Credit cards purchases and withdrawals are usually protected by banks, and will be reverted if anything goes wrong. This is partly possible because a credit card transaction is settled during 2-3 days unlike a bitcoin transaction on a blockchain.

the fact that CH has low limits is only related to a shitty financial system, nothing more nothing less.