I kept up my allowance for 2 months just to acquire sufficient UC to get the Lucky Spin Royale move
https://www.scribd.com/document/1002950446/Casual-Scrub-vs-Hardcore-Spender-Who-Buys-More-PUBG-UC-188028
I stored up my allowance for two months simply to acquire satisfactory UC to get the Lucky Spin Royale move, making the grind entirely worthy it.