The correct answer is: BUY MORE!At first I was tempted just by the free coins (who would not?), but then I got caught up by the friendly community and history of the coin, which leads back to the year 2013. The current version is not the same, but a reboot with a lot of changes, and I really like what I have seen.You simply have to determine if you are just trying to grab and or invest, or if you believe in a project like this one, to participate and stick along. I mean, if you read about a dev-less self-sustaining crypto-currency that is powered by an AI named Jarvis and that does not require mining to stay operational with very low power requirements for block generation, who would not stop and take a deeper look?I honestly completely lost oversight with all the ICOs popping up like mushrooms, they all have interesting ideas, whitepapers, large teams and a lot of social media presence, but it makes a difference if you put in your money or if you get a head start with a rather large airdrop and a promising future. Reading more about Marinecoin made me believe in the project in a way, that I intend to buy more coins after I already got the free airdrop coins.Getting the airdrop coins really was just the start, their proof of promotion requirement and the new ICO rules makes each member a lot more involved in their rapidly growing community, which also ensures a fair and decentralized distribution of the majority of the coins.If you believe in something and it has value to you, do not sell.So in fact the better answer to the OP question is to buy more and hodl!But why would someone even try to sell his coins after the ICO has finished? This does not make sense at all because it would only decrease the value. I do not think that you can make quick money that way, because how can the value of a coin even be determined right after the ICO has ended? Once a new coin has hit a DEX first and some stupid guys try to sell, value goes down for that reason only without evaluation of the project itself. Marinecoin has their own exchange named F1CX.com where MTC can already be traded against Dogecoin, Lightcoin and Bitcoin, even though there are some rules in place to prevent grab and dump, so the price is not entirely influenced by that.