A credit card is someone else’s money that you can use for free for a limited unishopcctime (usually, the grace period lasts from 50 to 100 days). Your credit card expenses should not exceed your internal limit — say, 10-20% of your salary. That is, the amount that you can safely return.
If you urgently need a relatively large amount of money, goswipecvvand you can’t return it quickly, a credit card is not your option. Don’t even think about it! Apply for a regular cash loan — the rate is lower there. Otherwise-corruption, pain and bondage.