Play earlier battles to gather XP and coins, but you'll lose all progress you've got made in the present battle. In total, you need to collect 114 Gems Bonanza symbols, earlier than triggering the Gold Fever Bonus. https://xn--l3ca4b8epb5b.com/category/%E0%B8%84%E0%B8%A5%E0%B8%B4%E0%B8%9B%E0%B8%AB%E0%B8%A5%E0%B8%B8%E0%B8%94/