2018 has only revealed that the "hodl" meme is idiocy, and anyone that buys into it is a sucker. You sell when you've got a sizeable pile of money and prepare yourself for missing out on further gains. If it goes up, so be it. But if it collapses 95% then you're in an amazing position.
I agree. What I learned from my first bubble is that you take some gains when you're excited about them. You don't necessarily have to cash out, but if you're feeling an adrenaline rush when you check your balance, everyone else is too. You should do the opposite of what you're FOMOing. If you really really really want to buy based on the emotion you're feeling (of missing out), you should probably sell some.
I started to feel that excitement/fomo around $1200..