Participating in activities like MeepCity Racing or Starball provides coin rewards based on your performance.
Since there is no "infinite" button, players generally use these legitimate methods to build up their balance: MEEPCITY (INFINITE COIN)
Be extremely cautious of any "paper," website, or person asking for your login info in exchange for coins. These are often scams designed to steal Roblox accounts. Participating in activities like MeepCity Racing or Starball
Simply being in the game awards you coins every 5 minutes (this amount is increased if you have a Plus membership). A Note on "Glitches" and "Papers" MEEPCITY (INFINITE COIN)