Gp or Zp crates?

Ok guys so I got 19 ribbons atm and I want the gun collector one, 10 guns left to achieve it and I know I can buy 6 m9's and 4 p2's for 132k gp total.

I can only deposit 30k zp atm so I could buy 140k gp for 17k zp and get myself the ribbon but then I would only have 13k zp for zp crates.

Do you guys think I could achieve 132k gp with 30k zp ( about 38 crates )?

Im not depositing more soon so should I buy the Gp and then the crates or waste all the zp on the crates hoping to get enough gp and risk getting the ribbon?

Thx in advance.

Comments