Using BTC vs. Using Credit / Debit cards and purchase tracking and privacy.

[NeuroticFish]

Those rewards are not free money. They are paid by the merchants who must then increase the prices that you pay.

It's not the merchants that gives the reward. It is the CC issuer. Every time you make a POS transaction the merchant has to pay a small fee. They share the fee with you.

There are many cases the CC issuer and the merchant strike a deal to give you those rewards.
There are many cases the CC issuer has CC branded under the merchant's name - again, part of a deal that should end up with some benefits for you if you use that CC, compared to the rest of the buyers.

[MinMan]

Mate, you just have to use what you feel is the best for you at the moment. You don’t need anyone to direct you on what you’re meant to do, as long as you have something to do and you feel that one of these payment methods is going to be far much useful when you make use of it, then you should go for it.

Moreover, I don’t see why you would be need privacy fir some regular shopping that you have been doing for years. It’s all about knowing what is the right and perfect thing for you to do. The debit cards are not bad, at least with them you’re getting up to 5% Cashback or so on your purchases that you make.