I stored up my allowance for two months simply to purchase enough UC to get the Lucky Spin Royale cross
https://lorenzoqlhf387.almoheet-travel.com/buying-pubg-uc-for-new-mythic-outfit-releases-my-shopping-strategy
I saved up my allowance for 2 months just to buy ample UC to get the Lucky Spin Royale pass, making the grind entirely value it.