Credit cards are not a feature of a currency. You could just have credit cards that keep debt in BTC instead of USD.
The point of the person you're replying to is that, for 99.999999% of businesses, there is no benefit to using BTC. It doesn't offer the buyer any protection, it's extremely volatile, and it would require an overhaul of the entire economy's infrastructure to implement in any meaningful way.
The point of the person you're replying to is that, for 99.999999% of businesses, there is no benefit to using BTC. It doesn't offer the buyer any protection, it's extremely volatile, and it would require an overhaul of the entire economy's infrastructure to implement in any meaningful way.