I saved up my allowance for two months simply to acquire adequate UC to get the Lucky Spin Royale move
https://www.scribd.com/document/987529033/Top-five-Things-I-Consider-Before-Buying-PUBG-UC-Online-And-Why-Manabuy-Checks-All-164631
I kept up my allowance for two months simply to buy enough UC to get the Lucky Spin Royale flow, making the grind wholly value it.