Depends, if you a broke ass nigga you gotta make money, if you aint hella raw pushin units then theres no point of rapin if you have zero income.
Some people use music as enjoyment, and do it for the fact of just being able to you feel. Regardless when it all comes down to it, you have to make money so weather its working or only doing music you still need to be bringin in the bacon yadda.
Although, if your trying to do music on a major scale then all your time needs to be towards your music. And if thats the case then a rapper shouldnt work, but like I said before there are so many niggas rappin now, its just like who the fuck care.
I don't see nothing wrong as long as a nigga is makin moves trying to better themselves u feel. Music will always be music, however the age 18-25 is a cruical point in many people lifes, if you aint doing it movin now then you will be fucked later in life.
Weather working or not, its all about the money however you get it more power to you.