All those altcoins that you have received from bounties will provide you more profit during halving because they are free of cost and you gain it through Completing a task. Those who buy altcoins are sometimes at risk because they don't know that this new altcoin is profitable or not but if someone received it out of cost then if unfortunately it shows reduced cost then your financial status will not be effected.
For longer term you can only hold etheruem among all other altcoins whereas other altcoins should be put on sell whenever they rise in value because there is no guarantee about its future worthiness. Holding altcoins longer if they have no value but once it attain value even a small increase then a holder should accept this rise otherwise it will become regression for you.