Yes, credit cards are insecure. But it's also relatively easy to do a chargeback. > Or do I have a logic error in my thinking and all payment systems will alwa

Yes, credit cards are insecure. But it's also relatively easy to do a chargeback. > Or do I have a logic error in my thinking and all payment systems will always have attack vectors similar to stealing a number? If you have a secret number, that secret number can be stolen, whether by hacking your computer or beating you with an alkathene pipe. A secret key for a bitcoin wallet is fundamentally no different to a credit card number, it's just a larger number. The key difference though is that with a credit card, when my secret number is no longer secret, I can repudiate any transactions with a chargeback, and recover my lost funds (technically, the bank is writing off my debt, but same same).