Should i go ahead and get the iphone 5s or wait for the 6?

I had my iphone 4s for 3 years and the battery doesn't even last for 2 hours and it turns off and the internet doesn't even work or connect… So its pretty much useless. But i also want to iphone 6 bc i heard it was coming out. And i don't want to buy the 5s when i can just wait 4 months to get the iphone 6? But i don't know what to do. Bc my phone right now is horrable. An di might have to wait till next year bc it might be sold out?

Added (1). and its summer so maybe i can just wait… But i don't know! What would you all do?

If you just want to buy a iPhone! Buy any of the following 4s, 5, 5s… They"Re not so different from each other. Just a little bit of changes and a new iPhone is out!
i left using Apple…

Wait till the 6, then sell yours to gazelle! They pay you right when they get your phone - it's fast and convenient - I never use ebay its such a hassle. When I use gazelle, I use this link to pay me $10 more than usual: http://gazelle.extole.com/a/clk/2528F8