You need to identify the next big waves and decide which one you're most passionate about, and where you can add value. You shouldn't shy away from a crowded field. If the opportunity is large, a lot of people will enter the field before/after you so you need to figure out how to differentiate your product.
Here are a few tsunamis to think about:
1. Self-driving cars - which part of the value chain can you make a difference? Manufacturing, tech, ride hailing, financing, or others?
2. OTT TV - eventually, all content will be streamed. Where would the new value be created? What is the ideal experience in a world where you can watch anything, anytime on any device?
3. VR gaming/entertainment.
Everyone can see the big waves on the horizon. Not everyone knows how to ride them well...