It depends if you make more money from cryptocurrency than you make from your current job, then there no shame quitting your job.
I agree with you. But if you can do both then do it. I do have a full time job and yet find a way to still do some work with bitcoin. It gives more income to me. But there are things that I do not know with bitcoin so my earnings are limited. So if you have many things that you know to earn bitcoin then do it.