HODL hard or don't HODL at all
I must admit I don't really agree with this sentiment at all. "Hold some" makes a lot more sense to me personally.
I most definitely wouldn't cash out of cryptocurrencies completely, but if you have an unforeseen expense, I think it's much wiser to sell enough of your cryptocurrencies to cover it than to put it on your credit card or eat only ramen for a month.
Oh yes, I didn't mean it that seriously. It's fine if people cash out, but for my situation and if you're dreaming of the moon then real hardcore hodling is necessary. 100x gains won't get you to the moon on a small investment, you may need 1000x gains to get there, after all. If you only 'hodl some' you may need even more to get there.