It does depend on one's preference. Bounty campaigs would be a good option if the user is not into investing. Trading on the other hand would result to quicker profit because bounties do oftenly last for months. Both are profitable so either of the two would be a good thing to engage yourself with.
Bounty campaign is a riskless job, just spend your free time in this forum and earn money. If you don't like to invest your own money then invest your earned money in trading. i will do like this whatever amount i will earn from signature campaign half amount i will convert it into cash and remaining amount i will hold when the price drops i will invest in my fav coins.