There's nowhere to spend the gold

After 15 hours of gameplay, you will already have 100,000 coins. Come up with a way to spend your money so that the game makes sense. I suggest one of the ways: to pump the tavern to level 2 for 100.000 coins. Pump the tavern to level 3 for 250.000 coins. The appearance of the building would change depending on the level of the tavern.