1. Credit card, what should the cardholder do? It’s all the banks that make money. 2. The only one I know of so far is from Taiwan. She used her credit card to make money reasonably and legally. But her experience cannot be replicated. 3. Credit cards only provide us with a convenience. Spend first and pay later. Then it is just a tool to accumulate personal credit. 4. It is impossible to make money while using credit, it is a lie.