[beryllium]

The next big field is going to be Potatoes, son.

(But in all seriousness, the reason you see low-hanging-fruit being picked is because everyone is still trying to figure out how best to employ the internet - you're seeing microeconomies rising and falling at a rapid pace, innovation both thriving and being stifled - there's a lot of flux at the moment. When everything clicks into place, it's possible that everyone will need to be an entrepreneur in their own way.)