I do both. Bounty and trading. First i do bounty to get tokens and coins to use in trading. I joined different campaign or bounty to gather tokens that i will exvhange to ethereum and then i used that for trading. Bounty campaign doesnt require you to have money at start. So for starter like me i suggest that is the best thing to do. You dont have a big capital to start with trading.start with small amount then be familiar with the flow of the trading. Familiarize yourself in how the trading works. When and where to do trading. What trading site, when to sell and buy coins those are the things that you need to be familiar.