In case of bitcoin, you dont need to work. Just get bitcoins in your wallet and sleep. When you get up, your money will be increased as the price of the bitcoins tends to increase very fast these days.
Those who have tons of bitcoins, may be getting sweet dreams while sleeping as they are millionaire by now.
But if you have an good condition you can stay long in front of you computer and watch the movement of the price oin bitcoin wisdom.. the price looks like going to decrease slowly..