Air dropping coins to the existing holders will create demand and buy pressure in the market as the more you hold, the more you get from the airdrop.
People are not willing to sell because the ask rate is too low I think. Many people will start selling as the asking rate increases. Everyone is looking to see whats the total number of swapped coins be like.
I agree asking prices are too low. But I'm not sure increasing buy pressure by dropping coins to holders will increase liquidity. Personally, I would definitely hold if I knew an airdrop for holders was coming.
I think getting to an exchange and promoting the coin are more efficient in increasing prices, but that's just my opinion, hard to see the future...