Weapons or crates?

So, I got 61K+ GP and I wanna spend it but I'm not sure if I should buy GP crates or a new weapon, because I only got AK-47 and I live on FP weapons ;-;
Any suggestions about which weapon/crate should I buy?

probably a decent snipe i guess, or like a m4, or deagle.... in the end all ull ever need is a decent sniper (awm or w/e) and a rifle u can use (m4-ak w/e) and some deagles... everything else is not worth the time and money invested plus if u spin creates ur not guaranteed anything remember that...