I am engaged in earning bitcoin, ether, various tokens in free time. You can say this is my hobby. And work, as for me, should be some kind of stable, that is, what will bring a certain profit in a month. Then you can plan this month.Seeking for knowledge to know how bitcoin works and learning basic of bitcoin trading is why I spend my precious time on bitcoin and it is never a waste of time to me. Also remember that Knowledge is power(Francis Bacon,1597).With my knowledge of bitcoin and it trading, I have been able to make a great deal of profit when trading bitcoin.