The longevity of a token depends on it utility and acceptability there are so many coin that give out tokens in they airdrop programs and at the end never make it to exchange not even to talk of it surviving in the competitive market, and also airdrop is just a way of promoting new coin to the general public in other to draw they attention and have nothing to do with the success of the token likewise investment also their both have nothing to do with the success of the token but when a project have potentials then it will live longer in the market.