Well, doing the airdrop and bounties from a new project is really like a wheel of fortune.  Meaning if you will be lucky to have a coin that will have a value in the future or its just a design to your wallet.  I have also many ethereum token/coins in my MEW wallet also came from airdrops/bounties.  Sometimes, if given a chance, I check the twitter or discord or telegram if any for that particular coin/token to get some update and if already push for the exchange.  Then from there, I will make my next move, either to keep/hold the coin or sell it.