Maybe .. but then you might not end up good at either of them.
I think it would be exhausting, I mean how thin can you spread yourself before totally wearing out.
it's hard to maximize your potential in both when splitting your time and energy between the two.
well as long as they don't interfere with each other, regarding suffering from job performance/job stability, and as long as it doesn't affect one's health - work/life balance - then I see both could be a beneficial undertaking.
Sure why not