I do not agree with what you say to throw away your permanent job and have to focus on bitcoin. not me too greedy to take both but it would be better if we put our work on the bitcoin. but there is also a certain reason if we want to throw away our work like ordinary employees or honor can be fraudulent in pay mending we throw it away but if our work like civil servant mending us keep our work. 
Yes greed can be very bad factor. Focusing just on bitcoin can be very bad and maybe difficult in some aspect. But look from this perspective you have job 8 hours a day 5-6 days a week and you got payed for this, and on top of that can do 1-2 hours a job on bitcoin, on this you will have fiat and bitcoin as payment and you can use both.