A Bitcoin transaction is a signed data structure that can be executed anywhere in the world with or without internet access.
Credit Card:
Credit card transactions transmit delicate personal and financial information. The transaction reveals information such as credit card #, CV2 code, expiration date, which can lead to compromised accounts. The authentication process is the private key, it is the access code. This information is then transmitted and stored through out various portions of credit card transaction network. This then leads to gargantuan centralized databases of personal information waiting to be hacked.
Bitcoin:
Bitcoin's security is in the Proof of Work (POW) the miners perform. The digital signatures are inserted into the transaction by keys stored by the end user. The transaction itself represents non-sensitive information such as blockchain input, output and amount of Bitcoin transferred.
Conclusion:
Credit Card transactions are broken by design. The transactions transmit the secret key. When you transmit the secret keys then you expose your account to risk. A Bitcoin transaction is systematically different in that the information that is transmitted is not the key, it is a signed message, it is an authorization. The blockchain technology is eloquent and beautiful in so many ways.