Would you change your iPhone 5 for a 5s?

I'm a 14 years old guy, I can make my own money, but my mother and father always tells me. ''If I do not need something, I do not have to buy it''.

I have an iPhone 5 and I do not know if I have to change it for a 5s or keep it with me until next year.

If you were me. Would you buy it or keep it until next year?

http://www.theverge.com/2012/9/21/3363238/iphone-5-review

VS

http://www.theverge.com/2013/9/20/4752296/apple-iphone-5s-review