It is fine he already has a source of income. Even if it is not enough, it can keep him going while he learn about Bitcoin.
Many people who find it difficult in cryptocurrency as a whole are people who did not have were they earn before. They just come in empty-handed and hoping to become bitcoin millionaires overnight.
True. I would never leave my job even if trading were somehow 2x of my current salary. It's just not that reliable unless I have other sorts of income like a business, and considering that we're inside a market that we don't know if it is going to be worth the trade in the next few hours or so, I would not risk it.
Not sure how other full-time traders do now these days, but I would give them a kudos for keeping up. I was not able to even continue trading even when I was learning tutorials and stuff from Youtube. Day trading and trading itself is not just for everyone.
@OP Assuming you're still here reading comments, it's perfectly fine if you can't handle your time between your job and Bitcoin trading. It's a field that's not meant for everybody and I, myself, don't want to go back in that mental exhaustion I encountered long time ago.