Most of the bounty tokens i have got, still remains holding because most of the aren't included in the exchangers. Few tokens have listed in the exchangers but there value is very very low that can't cover my sending, selling and withdraw fees. I want to hold only few tokens which are promising and future potential.
In my experience, if a token costs nothing right after it gets listed on exchanges (and if voulumes are miserable), there's almost no chance to see it pumping in the future. So I just forget about such tokens and move on. There're hundreds of bounties and I might be lucky with the next one I pick.