Really depends on what did you do for the ICO and how you participated for the bounty campaign. How much articles you have 1-2? Videos, signature, translation of Whitepaper, Social Media. Did you participate in everything or just in one? When the ICO gonna send you the tokens what is their price in the current moment and should you wait 2-3 months to get higher? Ask these questions and do it. 
Bounty earning is one of the way to earn in cryptocurrency also it is the safe way for me to earn because you dont loss money here even you participate in a scam bounty. Also doing bounty is good especially for those newbie, they can gain experience first here then they can do investing and trading.