I have played this game for more than 1000 days and I can certainly say that it is a waste of time and money. If you want to play a gacha game then I suggest that you visit an experienced psychotherapist and a financial advisor, because buying any bundles and in-game special currency will simply be the stupidest decision you will ever do when playing games. I happened to do this mistake, due to my poor mental health and now I'm thousands in debt as well as suffering from suicidal ideation.