In my opinion RSK Rootstock will be a game changer in 2018 (if their launch is in 2018 of course, not completely sure about it). I have no idea why do you, people, mention garbage ICOs in this thread. However I understand most of candidates are going to launch in 2019 - i.e. Hashgraph, Dfinity, Solana etc., so it's not the easiest task to pick sth big for 2018.