Hello newbie,
I wanna share my experience with you about bounty/ ICO. In December 2017, there was so many ICOs that you could get x10 or x20 profit.

However, It was competitive to join in those hot ICO because of whitelistiing and gas war battle. I finally found one and get whitelisted. It guaranteed that every whitelisted member can contribute with 1ETH. The market started to bearish in early Februry, I decided to contribute 0.5 ETH, at the same time, I also joined 1 bounty. As of today 03/23, the free tokens i got from bounty are still same price of ICO, but the tokens I bought from ICO goes down from 0.0005 ETH to 0.0002 ETH.
I realized that many ICO just goes down when they hit the exchange, with that experience, I mostly join bounty.
You have nothing to loose to join bounty but extra income.

Do you have any experience with your ICO or bounty?
You are mistaken you have something to lose if you join bounties, if you join a bounty campaign and the tokens are completely without value you will lose your time, and you need to remember that most bounty campaigns pay after the ico is over so you will need to wait for months to get your coins, so we are not talking about wasting a few days or weeks but many months of your work.