Honestly, Cardano has a lot of great advantages which will help it skyrocket in 2018. ADA has solved the problems regarding sustainability by the use of an independent wallet called Treasury. It works by storing a small part of each transaction inside this wallet, and these funds are later used for financing various new projects and development plans. The best part is that the users themselves get the ability to vote on what needs to be changed, which is followed by the payment releases from Treasury.
The vote will be available to the owner of Cardano only in 2019. This year, we are waiting for smart contracts and mining PoS! Yet there was no announcement of these large additions, and the coin has already gone up!