Focus is good but beware going too narrow and betting it on volatile industry.
http://www.khou.com/story/news/local/2016/01/05/houston-deals-layoffs-high-home-prices/78293832/
Yeah computer science is so stable. I’ve been in Silicon Valley since 2000, and I’ve seen the recession of 2003 reduce my commute down Tasman from 20 mins to 5 mins. I’ve seen the recession of 2009, where I couldn’t find a job or an interview for nearly nine months. Like any industry, once it recovers, it can recover with explosive force. Shoot, who could have predicted the outsourcing of legal work, where XX,XXX law graduates are still looking for legal work in their profession. Doesn’t even pay to be a doctor much at times, since the Davinci Robot and technology will allow one doctor to do the work of many. So your argument has no merit.
There is a major at a very few schools called “Energy Commerce.” Seems like a safer bet, as it encompasses more than just oil.