What is the point of the safe?

The point of the safe is basically to replace the premium package that used to be available before the update. Basically, all the premium package did was it duplicated your earnings of EXP and coins by x2 for a small sum of in-life cash. However, in the update, they replaced this offer with the safe. As you play, you earn bonus coins in which the safe collects until reaching 20k, where it will be available to the player for 24 hours. Unfortunately though, as stupid as it may be, you have to pay in-life cash for the bonus within the safe. Once 24 hours has pasted, it will be too late for the purchase, but it will reset, and begin collecting bonus coins once again, reaching 20k, and repeating the following process of being available for 24 hours. Personally, I believe it's a bit ridiculous, having in to pay in-life cash for a bonus that essentially you have earned through gameplay, but it's simply just another quicker way for the company to earn money.