Was this encounter a scam or kidnapping attempt, and how can I legally protect myself?

I was at the bus stop when a guy asked where I worked and what bank I use. He said he has a business and could help me earn extra money—around $200 a week. He claimed that if I said I worked at a construction site, it would help us make money. Then he offered for me to get into his car.

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2 mo
What weapon should I buy to protect myself? I had this in my question but girlsaskguys edit the question
Was this encounter a scam or kidnapping attempt, and how can I legally protect myself?
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