Chipotle shows that any investor can build wealth investing in high-quality businesses.Chipotle Mexican Grill (CMG 0.20%) has been one of the best-performing restaurant stocks over the last 15 years. While early investors have made a lot of money even off a small investment, newer investors should still be encouraged by Chipotle's recent business performance and its impact on the stock's return.Earnings per share surged 540% over the last five years. That massive increase in profitability helped drive the s ...