Completely your call. The IV won't change and CP can always be raised, the CP will likely be greater at lvl 20 but then you will have to wait and could possibly get a Jynx.
My answer is do you want to face palm having waited to get a Jynx or facepalm getting a Jynx now.
Having said that if you get something really good now you may not have got that if you waited and vice versa as results are purely random.
My advice is only use your 3 use incubators for 10K eggs as you will soon have no more unless you spend real money or are a super gym battler.