Advice On Whether Or Not To Get A New Card.

Hi All, I'm debating on whether or not i should get another card or a more "flagship" Card if thats a thing, just a card that has a higher, currently i have one card shared as a auth user Quicksilver with 5,500 limit on it (i don't actually use it, just shared to me when i first turned 18 to boost my credit) then two personal cards, One Journey Student Card I product changed to a Quicksilver, and a Quicksilver i recently changed to Savor, The first card has a 600 limit (capital one refuses to increase the limit on this one by any big amount) and the second one is at 14,000 (I can usually raise the limit every 2-4 months) and i just bought a car in april, and currently sit at 5 inquires (it was kind of a mess when i bought the car long story) with one dropping from an old application in November

(I'm sorry in advance if a lot of people ask for this stuff, i dont mean to add to any spam )