Business or Personal Credit Card?

[Account Closed]

So I have created a DBA and signing up for a Chase Business Checking Account to organize money flow and make filing taxes easier. My question now, if there was an expense/repair that I need to pay, should I use my personal credit card and pay it in full within a month or open a business credit card?

My personal credit card has a limit of $30k with only 4% APR and 2% unlimited cash back on all purchases. I was told it is very bad mixing business and personal together, but I don't have a LLC so I don't even think it matters with my situation (I do have umbrella insurance). Reason for paying with credit cards is cause I like to use the perks that comes with them even though I can pay in cash (I haven't touch my debt card in 2 years lol).

What do ya'll think/recommend? Can should I just use my personal credit card or open a business card with the DBA?