I am inclined to think that it would still be worth holding the coins, the profit will undoubtedly be. the main thing to have patience
"The profit will undoubtly be" Then what's gonna happen if it turned out as a loss or after the end of one year, the market value of the altcoin is less than what it is? Just look at bitcoin. Aug 2017 vs aug 2018
Truly we cant be sure if we gain or not from such a long days of holding. We know how market change and it volatility became strong which we can't determine if that certain coin will go for moon or just buried down. It is better to be in short term investment as we can easily tract our coins.