Torn between two jobs

I'm 18 and a sophomore in college. I've been working as a customer service specialist at Best Buy for a couple months. I was offered a job today, by a local bank, as a teller. I'd love to get my foot in the door in the financial services industry, but I'm a little leery of up and leaving my job at BB. Wanting some advice on the matter. I think a teller would be better on a resume, but I don't want to flippantly leave my stable job.

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