Staying updated always is the main hodl strategy. Many projects have migrated to its own blockchain of recent and some persons have been left behind during these migration. If you want a long term hodl, hold few tokens you can always monitor their development progress.
Agree.. especially if you want to hold altcoin from new project do not miss any update from the project. But, i suggest hold only major altcoin. i'm holding only from top 25 in CoinmarketCap.