depending fully on crypto currency as a means of livelihood is a wrong decision, like the author likely said, its good to earn bitcoin and crypto currency through the various means possible, but depending solely on it as a means of living will result in emotional disorder in times of a bearish market like we are currently in now.
Everyone in this world must have strategy in their life. Life who only depends on crypto i think is totally wrong, and like you and other else in here might be agree with it. We must have real job with fixed salary to keep maintain our life.
Its good to have a real job because there is no surety about crypto but its only for those who are still lack of knowledge in those crypto currency. It can easily be use as an additional source of income as its reliable and give a more recent and easy opportunities. For those who have no real job they also can live better life with bitcoin earning for joining bounties campaign.