i prefer both, because in this way you can earn more and you well know the matters outside from bitcoin. bitcoin just need your small part of attention, this attention contain focus and strategy.
You are right we can do bitcoin together with our main job, we can arrange time after work or on week end, maybe by the time we are retire from our main job we can take full time to fill time with positive things .
The person who already once tried to earn Bitcoin, will never abandon this opportunity. Thus, being unemployed or even being in the workplace, he will always find time to work with the crypto currency. The fact is that in some cases with the help of Bitcoin you can earn much more and earn more quickly than on legal work.