Bitcoin will always be there holding some price, but I think 2017 will be the year of altcoins and we will see many new and innovative coins launched by that point.
In each year if bitcoin progresses to some extent that means it was the year of bitcoin so i feel all the years where bitcoins moves up are the years of bitcoin but there is no particular year of bitcoin, maybe as you say some new and good altcoins may come to the market in coming year.