A degree in math is highly useful, but most potential employers don't know it. It takes much self-discipline and self motivation to use it wisely, but opportunities are not going to fall into your lap.
I have come across many math specialists as a computer programmer. They are people who make more money than programmers and tell programmers what to write. Math trains the mind to abstract the business needs into computer processes, which is the invaluable glue that ties them together.
Originally, I trained as a mathematician, but found little opportunity outside academia. Then I once went to a conference in which there was a session on job development. It turned out that every speaker was a mathematician who consulted in the programming industry. The message was clear: learn programming, too, if you want to use your math.
For example, one speaker talked about several projects, but one in particular stood out for me. He was tasked with modeling some data which I forget the details of, but he recognized that Prolog was a language to model it that made everything simple. As a mathematician with programming skills, he was in the unique position to connect those two fields together. The business guys would never have known about Prolog, and the programming guys would have relied on the business guys for specs and muddled through.
All the speakers at the session had similar stories. They were paid great sums to connect business methods and computers together, because the specialists on each side understand their own fields in concrete terms. It takes the ability to see abstractly as mathematicians are trained to create solutions.
But it also takes a certain confidence and work ethic to pursue these opportunities. You need to be your own boss and have the drive and people skills to get the contracts. For those who can do it, the rewards are huge.