alt Hacker NewsThere is more to life than earning money, and not all skills need to be in service of that.
Regardless, both of those talents have the potential to open doors and set the stage for opportunity, nor are they mutually exclusive to whatever economic skills might be viable in the future.
If you have rent or a mortgage, there is little more important than paying it. Everything else comes after. Everyone alive in the developed world today grew up in a wondrous period of history where the middle class had many luxuries previously only afforded to those with inherited wealth. There are signs that period is ending.
I'm not against things like learning to play an instrument, but if you're going to major in Music Theory, you better have a solid plan for a career on the other end. It can be a risky plan, but it has to be real with non-zero odds of success. It can't be just because you love playing the violin.