You know what, I don't agree. The rule is actually simple; you buy Bitcoin and keep it safe. That's all there is to it. What's not easy with that?
The thing is that people are complicated. We want to trade. We want to analyze charts, develop patterns, make strategies on the best entry and exit points, and so on. We want to invest in altcoins for better opportunities. We get into ICOs, IDOs, DeFi, staking, and so forth. And we are emotional, too.
But what is there in the entire history of Bitcoin that says mere HODLing is not the best thing to do?
no doubt mere hodling is the easiest form of making money in the crypto world, but remember, it's different strokes for different persons, you may see hodling as the best thing to do, whereas the person next to you doesn't reason that way and they can't not be blamed because everyone is supposed to work with what favours them, right??