To be perfectly honest, you can get a "safe" degree and still not find success there. A good portion of how success works is all about the work you put in, the amount you're willing to risk (financial, mental, physical, emotional, temporal) and you're overall persistence. That still isn't a guarantee, you could find you're not cut out for the work, could decide what once was something you loved turned into the four-letter-word version of work (as in it feels like a curse word instead of just the regular definition).
I've been a PC tech since I was 15, that's 20 years of professionally servicing PC's and other jobs, networking, security, web development and other modalities. Recently I decided to close that avenue as a profession and seek a job elsewhere, partially because of a downturn in service demand, but mostly because I am burned out on what amounts to few interesting problems to solve and a whole lot of repetitive jobs. People might say "but you can make good money doing tech support/PC repair/etc." but my reply is: "My mental well being is threatened by what amounts to psychological repetitive stress injuries, or in, laymans terms, a job I loved became work I detest."
So in taking a pay cut, I've found I'm a little happier despite the loss of wages because you really cannot put a pricetag on stress reduction. Well I could but I don't think my customers would have appreciated a near 80% markup on their service contracts... In part because I would have needed the extra pay to get regular therapy.
Anyway, do something you want to do, have a fallback plan that allows you to do the things you want to do without starving. You don't have to choose right now exactly what you want to do, you can near-literally do whatever you want (though there's no guarantee you will succeed). Or you can pick a "safe" career/degree and always wonder "what if?"
