From 20k to 25k there's not that big difference, just saying.
But still as the mod said is very good chance to spend cp in wheel cause you gonna get pots and refines+the fuku ninja of your choice aaand whatever redeemable thing you choose from the stars shop. So that's up to you, do you want edo itachi or edo minato? if the answer is yes you should spend this week, in my humble opinion.