It depends a great deal on what's your near-term and long-term professional goal. The first one will advance your career in engineering, and the second one will further you on the path of entrepreneurship. That said, these two paths are not so far apart that you cannot switch from one to the other later on in life. In fact, you easily can.

If you are not very clear of your medium-term/long-term goal, let me invoke Jobs' advice[1] that you should follow your heart and let the dots connect backwards.

[1]: http://news.stanford.edu/news/2005/june15/jobs-061505.html