The importance of "hodling" is not to forget how hold is actually spelled. Is it just me or this hodl joke stopped being funny a few years ago?
And to be on topic, I think
http://deadcoins.com/ disagrees with you. Investing money in crypto and literally forgetting about it for a few years seems downright stupid. Don't assume that if Bitcoin rose so much in value the same thing is going to happen with every shitcoin around.
You are right, not every "shitcoin" will increase it's price. I don't even think their price should increase at all, but pump and dump will always be around, and that's why they are here for I guess. But if holding "pump and dump" coins is stupid, and I'm sure most people won't do it, holding bitcoin, or ethereum, or litecoin, or any of those major coins that already have proven that they actually have some value and real use, is very important in my opinion, not just because of the profit it might give you, but because of the support you are showing. I don't really need these pictures to hold my coins. I don't really hold BTC because the price is rising. I hold BTC because they have amazing potencial of use.
It's satisfying when you meet like-minded people. Of course, for the people who are in this since the beginning is not about the value, it's about the potential and the underlying technology. But I have the feeling that for the large influx of people who joined the party lately everything is about the value and the technology behind a project is only a justification for pumps & dumps whenever a new milestone is achieved.