If not for recently that I just decided to be holding pretty few altcoins at least, to some little bit of amount in some of them, I have never really considered altcoins as an option due to their pump and dump trend and to me, when it comes to long term hold, except for few of them, they are really not that something you will want to be putting all your mind into.
Unlike bitcoin, this is a market that has been in an uptrend right from the onset, and I want to believe this is one market I am so certain no matter how long you want to hold, you won't regret it. Not like I do not like the idea of altcoins, but at least, you can still be putting your funds in a market such as bitcoin and forgetting the rest.