high credit limit better.
I used to travel for work frequently last time.
higher limit comes in handy when I need to pay for hotel, meals etc in advance before company reimbursement. or sometime i organize event where I need to pay in advance for my friends. no need to fork out own cash for it.
besides, if you have the right discipline in your spending. why worry?

my principle is, i only spend for what I have. Credit card is only for convenience, its NOT my actual spending power.

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