Keeping the price up by incentivising holders through airdrop only won't work in the long term because once the airdrop ends everybody will dump the coin into oblivion. You better devise something more clever like real usage - that's where the real value of the currency comes from. Tony is working on exactly that by incentivising usage through cashback but it's not easy because it requires merchants and payment processing companies cooperation.
It's not hard to find real usage, for example right now byteball has 18477x less fees than bitcoin and it's faster than ethereum or at least as fast, even ethereum has 166x more expensive transaction fees. You'd be mad not to use this to buy your every day stuff, from groceries to weed (blackbytes). Also, you need GB to rise 66x, that's 21k~$ / GB in order for the transaction fees to go as high as 0.01$ US, one cent. Fastest, cheapest, untraceable and I didn't even touch the P2P, smart contract part.