I have so many new altcoins that taken from bounty campaigns and airdrop campaigns, majority of my altcoins has very low value, and i just decided to keep this in my wallet hoping that it could give me more profit in the future.
Well keeping it in your wallet for a long time may end up with your coin losing it's value altogether. I'd prefer to sell token once they become available with whatever value they have. Most of them aren't worth much anyways.
I would prefer a different tactic: keep these coins until they are really expensive. New coins are very cheap and are traded on exchanges, such as bitebtc.com, listing which is cheap compared to other exchanges.