Investment is a best way of passive income compare to bounty campaign job. Because when we invest wisely using a good timing and strategy, I'm sure the returns of income are much better compare to bounty income, because not all bounty campaign are successfully operated and having good market value on their tokens.
Well both are good to work on and put investment. While trading, you do not have to watch the price because you can set the order after analyzing the market. Bounty campaign rewards are helpful to have something to invest with for you not depend on selling real state asset. Though some coin do not give enough profit, the earning from it, as long as it has exchange, can be a start a small investment that can be grow on the right time.