I stored up my allowance for 2 months just to acquire satisfactory UC to get the Lucky Spin Royale cross

https://www.scribd.com/document/987599904/Switching-from-Gift-Cards-to-Web-Based-PUBG-UC-Purchases-Pros-Cons-191612

I kept up my allowance for two months just to buy ample UC to get the Lucky Spin Royale cross, making the grind tremendously worthy it.