Meep City Auto Farm (unlimited Coins) -

You receive a small amount of coins automatically every 5 minutes just for being active in the game.

One of the fastest ways to earn. You can catch fish and sell them at the Pet Shop. MeepCity Wikia notes that having the Plus Gamepass increases your payout per fish. Meep City Auto Farm (UNLIMITED COINS)

Participating in minigames like Starball or the MeepCity Racing tracks awards coins based on your performance. You receive a small amount of coins automatically