Who didn't do this in the beginning? Who didn't succumb to fomo? The mind plays tricks on you, but if you're smart enough you can catch yourself slipping and stop it. I have. I never buy in the green (though sometimes I could probably stand to make a decent profit, but the possibility to get burned is bigger). And I never sell in the red. As easy as that. Oh, and I can hold. I can hold big time. I have a new personal policy: not selling until 10x. I only invest in projects I see as viable and with a good team. If you keep to these rules, you can't lose, bar some catastrophe.