I was just looking at this screenshot of the coins 1 year ago (18 November).

The top 3 are still the same of course, though the prices changed drastically, it's still interesting to see the other coins drop off and disappear like that.
Undoubtedly that the composition of the top ten will change on the coinmarketcap during 2018, and I think that some of the coins in the second five will be swapped, most likely the first five coins will remain unchanged. One or two coins will go beyond the top 10, they will be replaced by others