If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life.
The only thing that scares me in the tech area is that it moves so fast that you have to be ready to invest in 20 things. Because if you just invest in one, next week, somebody has a better mousetrap, and you get taken to the cleaners.