The correct answer to this open question is the following.
You forgot to include the question. Here we just have a statement, but no question at all.
Maybe you wanted to add an opinion or you need to say if this individual needs an extra credit card.
If that is the case, then we can comment on the following.
No. Marshall doesn't need an extra credit card. He already has six, another one could be a burden to his financial record.
Marshall is doing well. He lives a solidly middle-income lifestyle. He’s paying his student loans, his rent, and all of his other expenses on-time. There is no reason to incur more debt with another credit card.
Plus the fact that the other six cards pay 0% interest for the first year, free airline miles, and 20% off his first month’s purchases at his favorite store. But all of that is going to change after the first year and interests are coming.
Until today, he has been strict in paying his full balance each month and he is responsible enough to stop using the card once the initial features expire. Although he desires to take a vacation using the advantages of another credit card, he has to be disciplined and refrain to get it. Six cards are too many for the way of life and the job he has. The moment he loses control of the use of the credits and gets into debt, plus interests, problems are going to raise.