What are the different currencies in the game and how are they used?

Uptown Bingo - Citylife has four main currencies, each with its own purpose:

Coins: Used to unlock milestones, progress through the game, and buy furniture and other items.
Energy: Required to play a round of bingo. You can spend more energy to boost your cards, and it regenerates over time.
Golden Tickets: Used to unlock extra boxes in the shop and reroll favors.
Keys: Generated by converting duplicate collectible cards. Keys are used to open additional gift boxes in the Collections screen.