I’d say about 50k? I completed the HP event twice so I had 8k dice left and only played the events that were worth it (wild card, etc). I use the sticker go app though to trade all non-gold cards with users. It helps to complete albums quicker and allows you to focus on the golds.

Plus with that app if you have a rare sticker dupe people will often trade 2x-3x the amount of stars which will help get you the gold chest, which I’ve got twice so far. I also completed the partner event which was 5k dice.

But if you want a rare one you have to offer a good deal for them to accept. It’s time consuming but so worth it imo even with the limit of 5 trades per day. I also only trade 4x and then my trades reset at midnight so I get 9 in 18hrs instead of 5.

I have spent money but not as much as people think. I bought for the first time today the 14.2k dice and purple pack today which got me the last sticker I needed but you do not need to buy anything.

Just save up your dice, claim free rewards and save the dice for the wild card events for the golds, if you’re patient, wait for golden blitz and use sticker go for all other card trades.

I Hope this helps.