For me it's Monero. It's not ICO/Airdrop, but still a coin worth mentioning, I hope. I've bought some in the days of 0.5$-2$ prices. I wish I would have bought more and would have hold them more.
The good thing is that I still have some and I don't plan to touch them in the next 2 years.
Personally, I would sell monero why the price is still high. There is too much competition with privacy coins and I have a strong feeling monero will crash hard.
There's competition for all types of coins. This is not a valid reason for the price to "crash hard".
And for now, Monero is still better than its competitors.
Also, right now the amount of Monero I have is not enough for my targets (at least pay all my debts), so I better leave it rise more. I believe that the best privacy coin should reach a couple of thousands sooner or later. I hope it'll be Monero.