Ahh I can remember Oyster Pearl. I guess such an opportunity hardly will come back (if ever). But I still think it can make sense to hold bounty tokens of promising projects until the next bull market comes in full swing.
The token was worth less than $0.01 and then jumped to over $1 in no time so I don't think we'll get to see such a big pump in any of the recent altcoins bearing in mind the market has terribly suffered due to several incidents. Now, I'm just holding my coins coins and earning dividends from projects like Pundi and MTC that give $100 per month. Besides these, am just selling the other coins.