Jeff Bezos has a famous quote: "If you think about what you will do in the next year, you will immediately think of many competitors. However, if you think about what you will do in three years, you will find that your competitors are much fewer. If you think about what you should do in five, seven, or even ten years, you will not be able to think of who your competitors are. People tend to overestimate the achievements of 3-5 years and often underestimate the achievements of 10-30 years."