It is obvious that ethereum and monero are going to be the only altcoins that are going to be worth it. Maybe a lot of altcoins who are on the top 30 will have a good 2018, but it is just matter of time until we can see how do their devs act against the new updates. I saw that Waves was going to be implementing a lot of things during this month, but it is very weird and i dont trust in that coin at all. Ethereum forever, and monero is one of my favourites too.