Does she like me because of money?

I just met this girl 3 days ago, she's 18 years old, she clearly shows signs that she likes me, she already introduced me to a lot of her friends but she seems much interested in my toys so much, she talks about my headphones, my iphone and stuff like that, and today she was already asking me what i intend to present her friend as a birthday gift which will be tomorrow. She is suggesting that i give her friend money to buy her own gift. I really like this girl but i'm begging to think she likes me because of money or something… Please help me understand something… All suggestions are welcome… Thank you

It certainly sounds that way to me, yes. Please don't give her or any of her friends any money or gifts. It's way too early for that and you have no obligation to do so.
To give you an example of how normal people behave, I give my husband, daughter, and family members presents for their birthdays, but I don't recall ever ever giving anyone else's friend a birthday present or any money to buy themselves a gift.
She is greedy and tacky and best left alone, in my opinion.

It sounds like she's in it for the money… To be honest. Don't give her or her friends any gifts or money!

Thanks to you all for your opinions, i really appreciate that.