Think about what being an alpha among a primitive group of humans (or apes) entails. It's part something that is internalized and demonstrated by that individual, and part reinforced socially by the rest of a small group of people who, within the context of the group, plainly recognize that individual as "best". This same dynamic exists for craftsmen among the group, for instance.
Being at the top is always a function of where everyone else on your radar is at. It's just now you have to be your own cheerleader, because it's a much bigger pond.
You have to make calculated decisions about how different things validate you (recreation vs greatness); being great at something in the 21st century really means putting your head down and having an unwavering faith in yourself. You have to keep lifting yourself back up, as the reward is always 10 steps out and always fleeting. At the same time, you now have an infinite amount of resources and inspiration for what you could become. You aren't limited by the nearest available expert, and you aren't limited by your imagination. It's all there for you to pick off the shelf.