When to Go All in on a Project or an Idea?

Conan O'Brien: At what point do you know when to go all in on a project or an idea and when to give up on a project? He says the character that you've been acting as can't be any more, like their strategies don't work for this new thing. "You burn the boat's moment were like, i'm not going back," he says. 'It reminds me of how relationships are never over"